From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 docshell/test/mochitest/bug1422334_redirect.html   |   3 +
 .../mochitest/bug1422334_redirect.html^headers^    |   2 +
 docshell/test/mochitest/bug404548-subframe.html    |   7 +
 .../test/mochitest/bug404548-subframe_window.html  |   1 +
 docshell/test/mochitest/bug413310-post.sjs         |  10 +
 docshell/test/mochitest/bug413310-subframe.html    |   7 +
 docshell/test/mochitest/bug529119-window.html      |   7 +
 docshell/test/mochitest/bug530396-noref.sjs        |  22 +++
 docshell/test/mochitest/bug530396-subframe.html    |   7 +
 .../test/mochitest/bug570341_recordevents.html     |  21 ++
 docshell/test/mochitest/bug668513_redirect.html    |   1 +
 .../mochitest/bug668513_redirect.html^headers^     |   2 +
 docshell/test/mochitest/bug691547_frame.html       |  12 ++
 docshell/test/mochitest/clicker.html               |   7 +
 docshell/test/mochitest/double_submit.sjs          |  79 ++++++++
 docshell/test/mochitest/dummy_page.html            |   6 +
 .../file_anchor_scroll_after_document_open.html    |  15 ++
 .../test/mochitest/file_bfcache_plus_hash_1.html   |  24 +++
 .../test/mochitest/file_bfcache_plus_hash_2.html   |  17 ++
 docshell/test/mochitest/file_bug1121701_1.html     |  29 +++
 docshell/test/mochitest/file_bug1121701_2.html     |  23 +++
 docshell/test/mochitest/file_bug1151421.html       |  19 ++
 docshell/test/mochitest/file_bug1186774.html       |   1 +
 docshell/test/mochitest/file_bug1450164.html       |  16 ++
 docshell/test/mochitest/file_bug1729662.html       |   8 +
 docshell/test/mochitest/file_bug1740516_1.html     |  29 +++
 .../test/mochitest/file_bug1740516_1_inner.html    |  15 ++
 docshell/test/mochitest/file_bug1740516_2.html     |  11 ++
 docshell/test/mochitest/file_bug1741132.html       |  29 +++
 docshell/test/mochitest/file_bug1742865.sjs        |  77 ++++++++
 docshell/test/mochitest/file_bug1742865_outer.sjs  |  25 +++
 docshell/test/mochitest/file_bug1743353.html       |  37 ++++
 docshell/test/mochitest/file_bug1747033.sjs        | 110 +++++++++++
 docshell/test/mochitest/file_bug1773192_1.html     |  13 ++
 docshell/test/mochitest/file_bug1773192_2.html     |  13 ++
 docshell/test/mochitest/file_bug1773192_3.sjs      |   3 +
 docshell/test/mochitest/file_bug385434_1.html      |  29 +++
 docshell/test/mochitest/file_bug385434_2.html      |  26 +++
 docshell/test/mochitest/file_bug385434_3.html      |  22 +++
 docshell/test/mochitest/file_bug475636.sjs         |  97 ++++++++++
 docshell/test/mochitest/file_bug509055.html        |   9 +
 docshell/test/mochitest/file_bug511449.html        |   6 +
 docshell/test/mochitest/file_bug540462.html        |  25 +++
 docshell/test/mochitest/file_bug580069_1.html      |   8 +
 docshell/test/mochitest/file_bug580069_2.sjs       |   8 +
 docshell/test/mochitest/file_bug590573_1.html      |   7 +
 docshell/test/mochitest/file_bug590573_2.html      |   8 +
 docshell/test/mochitest/file_bug598895_1.html      |   1 +
 docshell/test/mochitest/file_bug598895_2.html      |   1 +
 docshell/test/mochitest/file_bug634834.html        |   5 +
 docshell/test/mochitest/file_bug637644_1.html      |   1 +
 docshell/test/mochitest/file_bug637644_2.html      |   1 +
 docshell/test/mochitest/file_bug640387.html        |  26 +++
 docshell/test/mochitest/file_bug653741.html        |  13 ++
 docshell/test/mochitest/file_bug660404             |  13 ++
 docshell/test/mochitest/file_bug660404-1.html      |  12 ++
 docshell/test/mochitest/file_bug660404^headers^    |   1 +
 docshell/test/mochitest/file_bug662170.html        |  13 ++
 docshell/test/mochitest/file_bug668513.html        | 101 ++++++++++
 docshell/test/mochitest/file_bug669671.sjs         |  17 ++
 docshell/test/mochitest/file_bug675587.html        |   1 +
 docshell/test/mochitest/file_bug680257.html        |  16 ++
 docshell/test/mochitest/file_bug703855.html        |   2 +
 docshell/test/mochitest/file_bug728939.html        |   3 +
 .../test/mochitest/file_close_onpagehide1.html     |   5 +
 .../test/mochitest/file_close_onpagehide2.html     |   5 +
 docshell/test/mochitest/file_compressed_multipart  | Bin 0 -> 111 bytes
 .../mochitest/file_compressed_multipart^headers^   |   2 +
 .../file_content_javascript_loads_frame.html       |  17 ++
 .../file_content_javascript_loads_root.html        |  42 ++++
 .../mochitest/file_form_restoration_no_store.html  |  38 ++++
 .../file_form_restoration_no_store.html^headers^   |   1 +
 .../test/mochitest/file_framedhistoryframes.html   |  16 ++
 .../test/mochitest/file_load_during_reload.html    |  12 ++
 .../file_pushState_after_document_open.html        |  11 ++
 docshell/test/mochitest/file_redirect_history.html |  18 ++
 docshell/test/mochitest/form_submit.sjs            |  40 ++++
 docshell/test/mochitest/form_submit_redirect.sjs   |  15 ++
 docshell/test/mochitest/historyframes.html         | 176 +++++++++++++++++
 docshell/test/mochitest/mochitest.ini              | 209 ++++++++++++++++++++
 docshell/test/mochitest/ping.html                  |   6 +
 docshell/test/mochitest/start_historyframe.html    |   1 +
 .../test_anchor_scroll_after_document_open.html    |  55 ++++++
 .../test/mochitest/test_bfcache_plus_hash.html     | 153 +++++++++++++++
 docshell/test/mochitest/test_bug1045096.html       |  29 +++
 docshell/test/mochitest/test_bug1121701.html       | 108 +++++++++++
 docshell/test/mochitest/test_bug1151421.html       |  61 ++++++
 docshell/test/mochitest/test_bug1186774.html       |  51 +++++
 docshell/test/mochitest/test_bug1422334.html       |  40 ++++
 docshell/test/mochitest/test_bug1450164.html       |  31 +++
 docshell/test/mochitest/test_bug1507702.html       |  57 ++++++
 docshell/test/mochitest/test_bug1645781.html       |  90 +++++++++
 docshell/test/mochitest/test_bug1729662.html       |  76 ++++++++
 docshell/test/mochitest/test_bug1740516.html       |  79 ++++++++
 docshell/test/mochitest/test_bug1741132.html       |  79 ++++++++
 docshell/test/mochitest/test_bug1742865.html       | 137 +++++++++++++
 docshell/test/mochitest/test_bug1743353.html       |  57 ++++++
 docshell/test/mochitest/test_bug1747033.html       |  97 ++++++++++
 docshell/test/mochitest/test_bug1773192.html       |  61 ++++++
 docshell/test/mochitest/test_bug385434.html        | 211 +++++++++++++++++++++
 docshell/test/mochitest/test_bug387979.html        |  52 +++++
 docshell/test/mochitest/test_bug402210.html        |  50 +++++
 docshell/test/mochitest/test_bug404548.html        |  39 ++++
 docshell/test/mochitest/test_bug413310.html        | 106 +++++++++++
 docshell/test/mochitest/test_bug475636.html        |  52 +++++
 docshell/test/mochitest/test_bug509055.html        | 115 +++++++++++
 docshell/test/mochitest/test_bug511449.html        |  56 ++++++
 docshell/test/mochitest/test_bug529119-1.html      | 110 +++++++++++
 docshell/test/mochitest/test_bug529119-2.html      | 116 +++++++++++
 docshell/test/mochitest/test_bug530396.html        |  56 ++++++
 docshell/test/mochitest/test_bug540462.html        |  44 +++++
 docshell/test/mochitest/test_bug551225.html        |  32 ++++
 docshell/test/mochitest/test_bug570341.html        | 142 ++++++++++++++
 docshell/test/mochitest/test_bug580069.html        |  58 ++++++
 docshell/test/mochitest/test_bug590573.html        | 198 +++++++++++++++++++
 docshell/test/mochitest/test_bug598895.html        |  52 +++++
 docshell/test/mochitest/test_bug634834.html        |  52 +++++
 docshell/test/mochitest/test_bug637644.html        |  52 +++++
 docshell/test/mochitest/test_bug640387_1.html      | 107 +++++++++++
 docshell/test/mochitest/test_bug640387_2.html      |  89 +++++++++
 docshell/test/mochitest/test_bug653741.html        |  49 +++++
 docshell/test/mochitest/test_bug660404.html        |  76 ++++++++
 docshell/test/mochitest/test_bug662170.html        |  51 +++++
 docshell/test/mochitest/test_bug668513.html        |  28 +++
 docshell/test/mochitest/test_bug669671.html        | 145 ++++++++++++++
 docshell/test/mochitest/test_bug675587.html        |  33 ++++
 docshell/test/mochitest/test_bug680257.html        |  76 ++++++++
 docshell/test/mochitest/test_bug691547.html        |  59 ++++++
 docshell/test/mochitest/test_bug694612.html        |  34 ++++
 docshell/test/mochitest/test_bug703855.html        |  79 ++++++++
 docshell/test/mochitest/test_bug728939.html        |  37 ++++
 docshell/test/mochitest/test_bug797909.html        |  66 +++++++
 .../test_close_onpagehide_by_history_back.html     |  24 +++
 .../test_close_onpagehide_by_window_close.html     |  20 ++
 .../test/mochitest/test_compressed_multipart.html  |  41 ++++
 .../mochitest/test_content_javascript_loads.html   | 163 ++++++++++++++++
 docshell/test/mochitest/test_double_submit.html    |  98 ++++++++++
 .../test_forceinheritprincipal_overrule_owner.html |  57 ++++++
 docshell/test/mochitest/test_form_restoration.html |  77 ++++++++
 .../test/mochitest/test_framedhistoryframes.html   |  32 ++++
 .../mochitest/test_iframe_srcdoc_to_remote.html    |  44 +++++
 .../mochitest/test_javascript_sandboxed_popup.html |  27 +++
 .../test/mochitest/test_load_during_reload.html    |  49 +++++
 .../mochitest/test_navigate_after_pagehide.html    |  34 ++++
 .../test_pushState_after_document_open.html        |  39 ++++
 docshell/test/mochitest/test_redirect_history.html |  58 ++++++
 .../test_triggeringprincipal_location_seturi.html  | 105 ++++++++++
 .../test/mochitest/test_windowedhistoryframes.html |  32 ++++
 docshell/test/mochitest/url1_historyframe.html     |   1 +
 docshell/test/mochitest/url2_historyframe.html     |   1 +
 150 files changed, 6479 insertions(+)
 create mode 100644 docshell/test/mochitest/bug1422334_redirect.html
 create mode 100644 docshell/test/mochitest/bug1422334_redirect.html^headers^
 create mode 100644 docshell/test/mochitest/bug404548-subframe.html
 create mode 100644 docshell/test/mochitest/bug404548-subframe_window.html
 create mode 100644 docshell/test/mochitest/bug413310-post.sjs
 create mode 100644 docshell/test/mochitest/bug413310-subframe.html
 create mode 100644 docshell/test/mochitest/bug529119-window.html
 create mode 100644 docshell/test/mochitest/bug530396-noref.sjs
 create mode 100644 docshell/test/mochitest/bug530396-subframe.html
 create mode 100644 docshell/test/mochitest/bug570341_recordevents.html
 create mode 100644 docshell/test/mochitest/bug668513_redirect.html
 create mode 100644 docshell/test/mochitest/bug668513_redirect.html^headers^
 create mode 100644 docshell/test/mochitest/bug691547_frame.html
 create mode 100644 docshell/test/mochitest/clicker.html
 create mode 100644 docshell/test/mochitest/double_submit.sjs
 create mode 100644 docshell/test/mochitest/dummy_page.html
 create mode 100644 docshell/test/mochitest/file_anchor_scroll_after_document_open.html
 create mode 100644 docshell/test/mochitest/file_bfcache_plus_hash_1.html
 create mode 100644 docshell/test/mochitest/file_bfcache_plus_hash_2.html
 create mode 100644 docshell/test/mochitest/file_bug1121701_1.html
 create mode 100644 docshell/test/mochitest/file_bug1121701_2.html
 create mode 100644 docshell/test/mochitest/file_bug1151421.html
 create mode 100644 docshell/test/mochitest/file_bug1186774.html
 create mode 100644 docshell/test/mochitest/file_bug1450164.html
 create mode 100644 docshell/test/mochitest/file_bug1729662.html
 create mode 100644 docshell/test/mochitest/file_bug1740516_1.html
 create mode 100644 docshell/test/mochitest/file_bug1740516_1_inner.html
 create mode 100644 docshell/test/mochitest/file_bug1740516_2.html
 create mode 100644 docshell/test/mochitest/file_bug1741132.html
 create mode 100644 docshell/test/mochitest/file_bug1742865.sjs
 create mode 100644 docshell/test/mochitest/file_bug1742865_outer.sjs
 create mode 100644 docshell/test/mochitest/file_bug1743353.html
 create mode 100644 docshell/test/mochitest/file_bug1747033.sjs
 create mode 100644 docshell/test/mochitest/file_bug1773192_1.html
 create mode 100644 docshell/test/mochitest/file_bug1773192_2.html
 create mode 100644 docshell/test/mochitest/file_bug1773192_3.sjs
 create mode 100644 docshell/test/mochitest/file_bug385434_1.html
 create mode 100644 docshell/test/mochitest/file_bug385434_2.html
 create mode 100644 docshell/test/mochitest/file_bug385434_3.html
 create mode 100644 docshell/test/mochitest/file_bug475636.sjs
 create mode 100644 docshell/test/mochitest/file_bug509055.html
 create mode 100644 docshell/test/mochitest/file_bug511449.html
 create mode 100644 docshell/test/mochitest/file_bug540462.html
 create mode 100644 docshell/test/mochitest/file_bug580069_1.html
 create mode 100644 docshell/test/mochitest/file_bug580069_2.sjs
 create mode 100644 docshell/test/mochitest/file_bug590573_1.html
 create mode 100644 docshell/test/mochitest/file_bug590573_2.html
 create mode 100644 docshell/test/mochitest/file_bug598895_1.html
 create mode 100644 docshell/test/mochitest/file_bug598895_2.html
 create mode 100644 docshell/test/mochitest/file_bug634834.html
 create mode 100644 docshell/test/mochitest/file_bug637644_1.html
 create mode 100644 docshell/test/mochitest/file_bug637644_2.html
 create mode 100644 docshell/test/mochitest/file_bug640387.html
 create mode 100644 docshell/test/mochitest/file_bug653741.html
 create mode 100644 docshell/test/mochitest/file_bug660404
 create mode 100644 docshell/test/mochitest/file_bug660404-1.html
 create mode 100644 docshell/test/mochitest/file_bug660404^headers^
 create mode 100644 docshell/test/mochitest/file_bug662170.html
 create mode 100644 docshell/test/mochitest/file_bug668513.html
 create mode 100644 docshell/test/mochitest/file_bug669671.sjs
 create mode 100644 docshell/test/mochitest/file_bug675587.html
 create mode 100644 docshell/test/mochitest/file_bug680257.html
 create mode 100644 docshell/test/mochitest/file_bug703855.html
 create mode 100644 docshell/test/mochitest/file_bug728939.html
 create mode 100644 docshell/test/mochitest/file_close_onpagehide1.html
 create mode 100644 docshell/test/mochitest/file_close_onpagehide2.html
 create mode 100644 docshell/test/mochitest/file_compressed_multipart
 create mode 100644 docshell/test/mochitest/file_compressed_multipart^headers^
 create mode 100644 docshell/test/mochitest/file_content_javascript_loads_frame.html
 create mode 100644 docshell/test/mochitest/file_content_javascript_loads_root.html
 create mode 100644 docshell/test/mochitest/file_form_restoration_no_store.html
 create mode 100644 docshell/test/mochitest/file_form_restoration_no_store.html^headers^
 create mode 100644 docshell/test/mochitest/file_framedhistoryframes.html
 create mode 100644 docshell/test/mochitest/file_load_during_reload.html
 create mode 100644 docshell/test/mochitest/file_pushState_after_document_open.html
 create mode 100644 docshell/test/mochitest/file_redirect_history.html
 create mode 100644 docshell/test/mochitest/form_submit.sjs
 create mode 100644 docshell/test/mochitest/form_submit_redirect.sjs
 create mode 100644 docshell/test/mochitest/historyframes.html
 create mode 100644 docshell/test/mochitest/mochitest.ini
 create mode 100644 docshell/test/mochitest/ping.html
 create mode 100644 docshell/test/mochitest/start_historyframe.html
 create mode 100644 docshell/test/mochitest/test_anchor_scroll_after_document_open.html
 create mode 100644 docshell/test/mochitest/test_bfcache_plus_hash.html
 create mode 100644 docshell/test/mochitest/test_bug1045096.html
 create mode 100644 docshell/test/mochitest/test_bug1121701.html
 create mode 100644 docshell/test/mochitest/test_bug1151421.html
 create mode 100644 docshell/test/mochitest/test_bug1186774.html
 create mode 100644 docshell/test/mochitest/test_bug1422334.html
 create mode 100644 docshell/test/mochitest/test_bug1450164.html
 create mode 100644 docshell/test/mochitest/test_bug1507702.html
 create mode 100644 docshell/test/mochitest/test_bug1645781.html
 create mode 100644 docshell/test/mochitest/test_bug1729662.html
 create mode 100644 docshell/test/mochitest/test_bug1740516.html
 create mode 100644 docshell/test/mochitest/test_bug1741132.html
 create mode 100644 docshell/test/mochitest/test_bug1742865.html
 create mode 100644 docshell/test/mochitest/test_bug1743353.html
 create mode 100644 docshell/test/mochitest/test_bug1747033.html
 create mode 100644 docshell/test/mochitest/test_bug1773192.html
 create mode 100644 docshell/test/mochitest/test_bug385434.html
 create mode 100644 docshell/test/mochitest/test_bug387979.html
 create mode 100644 docshell/test/mochitest/test_bug402210.html
 create mode 100644 docshell/test/mochitest/test_bug404548.html
 create mode 100644 docshell/test/mochitest/test_bug413310.html
 create mode 100644 docshell/test/mochitest/test_bug475636.html
 create mode 100644 docshell/test/mochitest/test_bug509055.html
 create mode 100644 docshell/test/mochitest/test_bug511449.html
 create mode 100644 docshell/test/mochitest/test_bug529119-1.html
 create mode 100644 docshell/test/mochitest/test_bug529119-2.html
 create mode 100644 docshell/test/mochitest/test_bug530396.html
 create mode 100644 docshell/test/mochitest/test_bug540462.html
 create mode 100644 docshell/test/mochitest/test_bug551225.html
 create mode 100644 docshell/test/mochitest/test_bug570341.html
 create mode 100644 docshell/test/mochitest/test_bug580069.html
 create mode 100644 docshell/test/mochitest/test_bug590573.html
 create mode 100644 docshell/test/mochitest/test_bug598895.html
 create mode 100644 docshell/test/mochitest/test_bug634834.html
 create mode 100644 docshell/test/mochitest/test_bug637644.html
 create mode 100644 docshell/test/mochitest/test_bug640387_1.html
 create mode 100644 docshell/test/mochitest/test_bug640387_2.html
 create mode 100644 docshell/test/mochitest/test_bug653741.html
 create mode 100644 docshell/test/mochitest/test_bug660404.html
 create mode 100644 docshell/test/mochitest/test_bug662170.html
 create mode 100644 docshell/test/mochitest/test_bug668513.html
 create mode 100644 docshell/test/mochitest/test_bug669671.html
 create mode 100644 docshell/test/mochitest/test_bug675587.html
 create mode 100644 docshell/test/mochitest/test_bug680257.html
 create mode 100644 docshell/test/mochitest/test_bug691547.html
 create mode 100644 docshell/test/mochitest/test_bug694612.html
 create mode 100644 docshell/test/mochitest/test_bug703855.html
 create mode 100644 docshell/test/mochitest/test_bug728939.html
 create mode 100644 docshell/test/mochitest/test_bug797909.html
 create mode 100644 docshell/test/mochitest/test_close_onpagehide_by_history_back.html
 create mode 100644 docshell/test/mochitest/test_close_onpagehide_by_window_close.html
 create mode 100644 docshell/test/mochitest/test_compressed_multipart.html
 create mode 100644 docshell/test/mochitest/test_content_javascript_loads.html
 create mode 100644 docshell/test/mochitest/test_double_submit.html
 create mode 100644 docshell/test/mochitest/test_forceinheritprincipal_overrule_owner.html
 create mode 100644 docshell/test/mochitest/test_form_restoration.html
 create mode 100644 docshell/test/mochitest/test_framedhistoryframes.html
 create mode 100644 docshell/test/mochitest/test_iframe_srcdoc_to_remote.html
 create mode 100644 docshell/test/mochitest/test_javascript_sandboxed_popup.html
 create mode 100644 docshell/test/mochitest/test_load_during_reload.html
 create mode 100644 docshell/test/mochitest/test_navigate_after_pagehide.html
 create mode 100644 docshell/test/mochitest/test_pushState_after_document_open.html
 create mode 100644 docshell/test/mochitest/test_redirect_history.html
 create mode 100644 docshell/test/mochitest/test_triggeringprincipal_location_seturi.html
 create mode 100644 docshell/test/mochitest/test_windowedhistoryframes.html
 create mode 100644 docshell/test/mochitest/url1_historyframe.html
 create mode 100644 docshell/test/mochitest/url2_historyframe.html

(limited to 'docshell/test/mochitest')

diff --git a/docshell/test/mochitest/bug1422334_redirect.html b/docshell/test/mochitest/bug1422334_redirect.html
new file mode 100644
index 0000000000..eec7fda2c7
--- /dev/null
+++ b/docshell/test/mochitest/bug1422334_redirect.html
@@ -0,0 +1,3 @@
+<html>
+  <body>You should never see this</body>
+</html>
diff --git a/docshell/test/mochitest/bug1422334_redirect.html^headers^ b/docshell/test/mochitest/bug1422334_redirect.html^headers^
new file mode 100644
index 0000000000..fbf2d1b745
--- /dev/null
+++ b/docshell/test/mochitest/bug1422334_redirect.html^headers^
@@ -0,0 +1,2 @@
+HTTP 302 Moved Temporarily
+Location: ../navigation/blank.html?x=y
diff --git a/docshell/test/mochitest/bug404548-subframe.html b/docshell/test/mochitest/bug404548-subframe.html
new file mode 100644
index 0000000000..9a248b40b3
--- /dev/null
+++ b/docshell/test/mochitest/bug404548-subframe.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+<body onload="setTimeout(function() { window.location = 'bug404548-subframe_window.html'; }, 10)">
+<iframe srcdoc="<body onpagehide='var p = window.parent.opener; var e = window.frameElement; e.parentNode.removeChild(e); if (e.parentNode == null && e.contentWindow == null) { p.firstRemoved = true; }'>">
+</iframe>
+<iframe srcdoc="<body onpagehide='window.parent.opener.secondHidden = true;'>">
+</iframe>
diff --git a/docshell/test/mochitest/bug404548-subframe_window.html b/docshell/test/mochitest/bug404548-subframe_window.html
new file mode 100644
index 0000000000..82ea73ea83
--- /dev/null
+++ b/docshell/test/mochitest/bug404548-subframe_window.html
@@ -0,0 +1 @@
+<body onload='window.opener.finishTest()'>
diff --git a/docshell/test/mochitest/bug413310-post.sjs b/docshell/test/mochitest/bug413310-post.sjs
new file mode 100644
index 0000000000..f87937ab56
--- /dev/null
+++ b/docshell/test/mochitest/bug413310-post.sjs
@@ -0,0 +1,10 @@
+function handleRequest(request, response) {
+  response.setHeader("Content-Type", "text/html");
+  response.write(
+    "<body onload='window.parent.onloadCount++'>" +
+      request.method +
+      " " +
+      Date.now() +
+      "</body>"
+  );
+}
diff --git a/docshell/test/mochitest/bug413310-subframe.html b/docshell/test/mochitest/bug413310-subframe.html
new file mode 100644
index 0000000000..bcff1886fd
--- /dev/null
+++ b/docshell/test/mochitest/bug413310-subframe.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+  <body onload="window.parent.onloadCount++">
+    <form action="bug413310-post.sjs" method="POST">
+    </form>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/bug529119-window.html b/docshell/test/mochitest/bug529119-window.html
new file mode 100644
index 0000000000..f1908835a7
--- /dev/null
+++ b/docshell/test/mochitest/bug529119-window.html
@@ -0,0 +1,7 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<title>Test bug 529119, sub-window</title>
+<body onload="window.opener.windowLoaded();">
+</body>
+</html>
diff --git a/docshell/test/mochitest/bug530396-noref.sjs b/docshell/test/mochitest/bug530396-noref.sjs
new file mode 100644
index 0000000000..6a65882160
--- /dev/null
+++ b/docshell/test/mochitest/bug530396-noref.sjs
@@ -0,0 +1,22 @@
+function handleRequest(request, response) {
+  response.setHeader("Content-Type", "text/html");
+  response.setHeader("Cache-Control", "no-cache");
+  response.write("<body onload='");
+
+  if (!request.hasHeader("Referer")) {
+    response.write("window.parent.onloadCount++;");
+  }
+
+  if (request.queryString == "newwindow") {
+    response.write(
+      "if (window.opener) { window.opener.parent.onloadCount++; window.opener.parent.doNextStep(); }"
+    );
+    response.write("if (!window.opener) window.close();");
+    response.write("'>");
+  } else {
+    response.write("window.parent.doNextStep();'>");
+  }
+
+  response.write(request.method + " " + Date.now());
+  response.write("</body>");
+}
diff --git a/docshell/test/mochitest/bug530396-subframe.html b/docshell/test/mochitest/bug530396-subframe.html
new file mode 100644
index 0000000000..be81b9f144
--- /dev/null
+++ b/docshell/test/mochitest/bug530396-subframe.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+  <body onload="window.parent.onloadCount++">
+    <a href="bug530396-noref.sjs" rel="noreferrer foo" id="target1">bug530396-noref.sjs</a>
+    <a href="bug530396-noref.sjs?newwindow" rel="nofollow noreferrer" id="target2" target="newwindow">bug530396-noref.sjs with new window</a>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/bug570341_recordevents.html b/docshell/test/mochitest/bug570341_recordevents.html
new file mode 100644
index 0000000000..45b04866ec
--- /dev/null
+++ b/docshell/test/mochitest/bug570341_recordevents.html
@@ -0,0 +1,21 @@
+<html>
+<head>
+<script>
+    var start = Date.now();
+    window._testing_js_start = Date.now();
+    window["_testing_js_after_" + document.readyState] = start;
+    document.addEventListener("DOMContentLoaded",
+      function() {
+        window._testing_evt_DOMContentLoaded = Date.now();
+      }, true);
+    document.addEventListener("readystatechange", function() {
+      window["_testing_evt_DOM_" + document.readyState] = Date.now();
+    }, true);
+    function recordLoad() {
+      window._testing_evt_load = Date.now();
+    }
+</script>
+</head>
+<body onload="recordLoad()">This document collects time
+for events related to the page load progress.</body>
+</html>
diff --git a/docshell/test/mochitest/bug668513_redirect.html b/docshell/test/mochitest/bug668513_redirect.html
new file mode 100644
index 0000000000..1b8f66c631
--- /dev/null
+++ b/docshell/test/mochitest/bug668513_redirect.html
@@ -0,0 +1 @@
+<html><body>This document is redirected to a blank document.</body></html>
diff --git a/docshell/test/mochitest/bug668513_redirect.html^headers^ b/docshell/test/mochitest/bug668513_redirect.html^headers^
new file mode 100644
index 0000000000..0e785833c6
--- /dev/null
+++ b/docshell/test/mochitest/bug668513_redirect.html^headers^
@@ -0,0 +1,2 @@
+HTTP 302 Moved Temporarily
+Location: navigation/blank.html
diff --git a/docshell/test/mochitest/bug691547_frame.html b/docshell/test/mochitest/bug691547_frame.html
new file mode 100644
index 0000000000..00172f7119
--- /dev/null
+++ b/docshell/test/mochitest/bug691547_frame.html
@@ -0,0 +1,12 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=691547
+-->
+<head>
+  <title>Test for Bug 691547</title>
+</head>
+<body>
+<iframe style="width:95%"></iframe>
+</body>
+</html>
diff --git a/docshell/test/mochitest/clicker.html b/docshell/test/mochitest/clicker.html
new file mode 100644
index 0000000000..b655e27ea5
--- /dev/null
+++ b/docshell/test/mochitest/clicker.html
@@ -0,0 +1,7 @@
+<!doctype html>
+<script>
+  "use strict";
+  let target = window.opener ? window.opener : window.parent;
+
+  onmessage = ({data}) => target.postMessage({}, "*");
+</script>
diff --git a/docshell/test/mochitest/double_submit.sjs b/docshell/test/mochitest/double_submit.sjs
new file mode 100644
index 0000000000..487150d456
--- /dev/null
+++ b/docshell/test/mochitest/double_submit.sjs
@@ -0,0 +1,79 @@
+"use strict";
+
+let self = this;
+
+let { setTimeout } = ChromeUtils.importESModule(
+  "resource://gre/modules/Timer.sys.mjs"
+);
+
+const CC = Components.Constructor;
+const BinaryInputStream = CC(
+  "@mozilla.org/binaryinputstream;1",
+  "nsIBinaryInputStream",
+  "setInputStream"
+);
+
+function log(str) {
+  //  dump(`LOG: ${str}\n`);
+}
+
+function readStream(inputStream) {
+  let available = 0;
+  let result = [];
+  while ((available = inputStream.available()) > 0) {
+    result.push(inputStream.readBytes(available));
+  }
+
+  return result.join("");
+}
+
+function now() {
+  return Date.now();
+}
+
+async function handleRequest(request, response) {
+  log("Get query parameters");
+  Cu.importGlobalProperties(["URLSearchParams"]);
+  let params = new URLSearchParams(request.queryString);
+
+  let start = now();
+  let delay = parseInt(params.get("delay")) || 0;
+  log(`Delay for ${delay}`);
+
+  let message = "good";
+  if (request.method !== "POST") {
+    message = "bad";
+  } else {
+    log("Read POST body");
+    let body = new URLSearchParams(
+      readStream(new BinaryInputStream(request.bodyInputStream))
+    );
+    message = body.get("token") || "bad";
+    log(`The result was ${message}`);
+  }
+
+  let body = `<!doctype html>
+    <script>
+    "use strict";
+    let target = (opener || parent);
+    target.postMessage(${JSON.stringify(message)}, '*');
+    </script>`;
+
+  // Sieze power from the response to allow manually transmitting data at any
+  // rate we want, so we can delay transmitting headers.
+  response.seizePower();
+
+  log(`Writing HTTP status line at ${now() - start}`);
+  response.write("HTTP/1.1 200 OK\r\n");
+
+  await new Promise(resolve => setTimeout(() => resolve(), delay));
+
+  log(`Delay completed at ${now() - start}`);
+  response.write("Content-Type: text/html\r\n");
+  response.write(`Content-Length: ${body.length}\r\n`);
+  response.write("\r\n");
+  response.write(body);
+  response.finish();
+
+  log("Finished");
+}
diff --git a/docshell/test/mochitest/dummy_page.html b/docshell/test/mochitest/dummy_page.html
new file mode 100644
index 0000000000..59bf2a5f8f
--- /dev/null
+++ b/docshell/test/mochitest/dummy_page.html
@@ -0,0 +1,6 @@
+<html>
+<head> <meta charset="utf-8"> </head>
+  <body>
+    just a dummy html file
+  </body>
+</html>
diff --git a/docshell/test/mochitest/file_anchor_scroll_after_document_open.html b/docshell/test/mochitest/file_anchor_scroll_after_document_open.html
new file mode 100644
index 0000000000..7903380eac
--- /dev/null
+++ b/docshell/test/mochitest/file_anchor_scroll_after_document_open.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<script>
+  if (location.hash == "#target") {
+    parent.postMessage("haveHash", "*");
+  } else {
+    document.addEventListener("DOMContentLoaded", function() {
+      document.open();
+      document.write("<!DOCTYPE html><html style='height: 100%'><body style='height: 100%'><div style='height: 200%'></div><div id='target'></div></body></html>");
+      document.close();
+      // Notify parent via postMessage, since otherwise exceptions will not get
+      // caught by its onerror handler.
+      parent.postMessage("doTest", "*");
+    });
+  }
+</script>
diff --git a/docshell/test/mochitest/file_bfcache_plus_hash_1.html b/docshell/test/mochitest/file_bfcache_plus_hash_1.html
new file mode 100644
index 0000000000..199f6003e0
--- /dev/null
+++ b/docshell/test/mochitest/file_bfcache_plus_hash_1.html
@@ -0,0 +1,24 @@
+<html><body>
+  Popup 1
+  <script type="application/javascript">
+    var bc = new BroadcastChannel("bug646641_1");
+    window.onload = () => {
+      bc.postMessage({ message: "childLoad", num: 1 })
+    }
+
+    window.onpageshow = () => {
+      bc.postMessage({ message: "childPageshow", num: 1 })
+    }
+    bc.onmessage = (msgEvent) => {
+      var msg = msgEvent.data;
+      if (msg == "pushState") {
+        history.pushState("", "", "");
+        location = "file_bfcache_plus_hash_2.html";
+      } else if (msg == "close") {
+        bc.postMessage({ message: "closed" });
+        bc.close();
+        window.close();
+      }
+    }
+  </script>
+</body></html>
diff --git a/docshell/test/mochitest/file_bfcache_plus_hash_2.html b/docshell/test/mochitest/file_bfcache_plus_hash_2.html
new file mode 100644
index 0000000000..c27d4eaa3b
--- /dev/null
+++ b/docshell/test/mochitest/file_bfcache_plus_hash_2.html
@@ -0,0 +1,17 @@
+<html><body>
+  Popup 2
+  <script type="application/javascript">
+    var bc = new BroadcastChannel("bug646641_2");
+    window.onload = () => {
+      bc.postMessage({ message: "childLoad", num: 2 })
+      requestAnimationFrame(() => bc.postMessage({message: "childPageshow", num: 2}));
+    }
+    bc.onmessage = (msgEvent) => {
+      var msg = msgEvent.data;
+      if (msg == "go-2") {
+        history.go(-2);
+        bc.close();
+      }
+    }
+  </script>
+</body></html>
diff --git a/docshell/test/mochitest/file_bug1121701_1.html b/docshell/test/mochitest/file_bug1121701_1.html
new file mode 100644
index 0000000000..62c58495f7
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1121701_1.html
@@ -0,0 +1,29 @@
+<script>
+  var bc = new BroadcastChannel("file_bug1121701_1");
+  var pageHideAsserts = undefined;
+  bc.onmessage = (msgEvent) => {
+    var msg = msgEvent.data;
+    var command = msg.command;
+    if (command == "setInnerHTML") {
+      document.body.innerHTML = "modified";
+      window.onpagehide = function(event) {
+        window.onpagehide = null;
+        pageHideAsserts = {};
+        pageHideAsserts.persisted = event.persisted;
+        // eslint-disable-next-line no-unsanitized/property
+        pageHideAsserts.innerHTML = window.document.body.innerHTML;
+      };
+      window.location.href = msg.testUrl2;
+    } else if (command == "close") {
+      bc.postMessage({command: "closed"});
+      bc.close();
+      window.close();
+    }
+  }
+  window.onpageshow = function(e) {
+    var msg = {command: "child1PageShow", persisted: e.persisted, pageHideAsserts};
+    // eslint-disable-next-line no-unsanitized/property
+    msg.innerHTML = window.document.body.innerHTML;
+    bc.postMessage(msg);
+  };
+</script>
diff --git a/docshell/test/mochitest/file_bug1121701_2.html b/docshell/test/mochitest/file_bug1121701_2.html
new file mode 100644
index 0000000000..6cec88cd5d
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1121701_2.html
@@ -0,0 +1,23 @@
+<script>
+  var bc = new BroadcastChannel("file_bug1121701_2");
+  bc.onmessage = (msgEvent) => {
+    var msg = msgEvent.data;
+    var command = msg.command;
+    if (command == "setInnerHTML") {
+      window.document.body.innerHTML = "<img>";
+      window.onmessage = function() {
+        bc.postMessage({command: "onmessage"});
+        window.document.body.firstChild.src = msg.location;
+        bc.close();
+      };
+      window.onbeforeunload = function() {
+        window.postMessage("foo", "*");
+      };
+
+      history.back();
+    }
+  }
+  window.onpageshow = function(e) {
+    bc.postMessage({command: "child2PageShow", persisted: e.persisted});
+  };
+</script>
diff --git a/docshell/test/mochitest/file_bug1151421.html b/docshell/test/mochitest/file_bug1151421.html
new file mode 100644
index 0000000000..7bb8c8f363
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1151421.html
@@ -0,0 +1,19 @@
+<html>
+<head>
+<style>
+body, html {
+    height: 100%;
+}
+.spacer {
+    height: 80%;
+}
+</style>
+</head>
+<body onload='(parent || opener).childLoad()'>
+
+<div class="spacer"></div>
+<div id="content">content</div>
+<div class="spacer"></div>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1186774.html b/docshell/test/mochitest/file_bug1186774.html
new file mode 100644
index 0000000000..9af95b09bd
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1186774.html
@@ -0,0 +1 @@
+<div style='height: 9000px;'></div>
diff --git a/docshell/test/mochitest/file_bug1450164.html b/docshell/test/mochitest/file_bug1450164.html
new file mode 100644
index 0000000000..55e32ce93d
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1450164.html
@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <script>
+     function go() {
+       var a = window.history.state;
+       window.history.replaceState(a, "", "1");
+       var ok = opener.ok;
+       var SimpleTest = opener.SimpleTest;
+       ok("Addition of history in unload did not crash browser");
+       SimpleTest.finish();
+     }
+    </script>
+  </head>
+  <body onunload="go()">
+  </body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1729662.html b/docshell/test/mochitest/file_bug1729662.html
new file mode 100644
index 0000000000..f5710e1c49
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1729662.html
@@ -0,0 +1,8 @@
+<script>
+addEventListener("load", () => {
+    (new BroadcastChannel("bug1729662")).postMessage("load");
+    history.pushState(1, null, location.href);
+    history.back();
+    history.forward();
+});
+</script>
diff --git a/docshell/test/mochitest/file_bug1740516_1.html b/docshell/test/mochitest/file_bug1740516_1.html
new file mode 100644
index 0000000000..ac8ca71d93
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1740516_1.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("pageshow", ({ persisted }) => {
+      let bc = new BroadcastChannel("bug1740516_1");
+      bc.addEventListener("message", ({ data }) => {
+        bc.close();
+        switch (data) {
+          case "block_bfcache_and_navigate":
+            window.blockBFCache = new RTCPeerConnection();
+            // Fall through
+          case "navigate":
+            document.location = "file_bug1740516_2.html";
+            break;
+          case "close":
+            window.close();
+            break;
+        }
+      });
+      bc.postMessage(persisted);
+    });
+  </script>
+</head>
+<body>
+  <iframe src="file_bug1740516_1_inner.html"></iframe>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1740516_1_inner.html b/docshell/test/mochitest/file_bug1740516_1_inner.html
new file mode 100644
index 0000000000..159c6bde5a
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1740516_1_inner.html
@@ -0,0 +1,15 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("pageshow", ({ persisted }) => {
+      let bc = new BroadcastChannel("bug1740516_1_inner");
+      bc.postMessage(persisted);
+      bc.close();
+    });
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1740516_2.html b/docshell/test/mochitest/file_bug1740516_2.html
new file mode 100644
index 0000000000..2dc714feef
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1740516_2.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    addEventListener("pageshow", () => { history.back(); });
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1741132.html b/docshell/test/mochitest/file_bug1741132.html
new file mode 100644
index 0000000000..d863b9f015
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1741132.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("pageshow", ({ persisted }) => {
+      let bc = new BroadcastChannel("bug1741132");
+      bc.addEventListener("message", ({ data: { cmd, arg } }) => {
+        bc.close();
+        switch (cmd) {
+          case "load":
+            document.location = arg;
+            break;
+          case "go":
+            window.blockBFCache = new RTCPeerConnection();
+            history.go(arg);
+            break;
+          case "close":
+            window.close();
+            break;
+        }
+      });
+      bc.postMessage(persisted);
+    });
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1742865.sjs b/docshell/test/mochitest/file_bug1742865.sjs
new file mode 100644
index 0000000000..950c30ecd2
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1742865.sjs
@@ -0,0 +1,77 @@
+Cu.importGlobalProperties(["URLSearchParams"]);
+
+function handleRequest(request, response) {
+  if (request.queryString == "reset") {
+    setState("index", "0");
+    response.setStatusLine(request.httpVersion, 200, "Ok");
+    response.write("Reset");
+    return;
+  }
+
+  let refresh = "";
+  let index = Number(getState("index"));
+  // index == 0 First load, returns first meta refresh
+  // index == 1 Second load, caused by first meta refresh, returns second meta refresh
+  // index == 2 Third load, caused by second meta refresh, doesn't return a meta refresh
+  let query = new URLSearchParams(request.queryString);
+  if (index < 2) {
+    refresh = query.get("seconds");
+    if (query.get("crossOrigin") == "true") {
+      const hosts = ["example.org", "example.com"];
+
+      let url = `${request.scheme}://${hosts[index]}${request.path}?${request.queryString}`;
+      refresh += `; url=${url}`;
+    }
+    refresh = `<meta http-equiv="Refresh" content="${refresh}">`;
+  }
+  // We want to scroll for the first load, and check that the meta refreshes keep the same
+  // scroll position.
+  let scroll = index == 0 ? `scrollTo(0, ${query.get("scrollTo")});` : "";
+
+  setState("index", String(index + 1));
+
+  response.write(
+    `<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="Cache-Control" content="no-cache">
+  ${refresh}
+  <script>
+    window.addEventListener("pageshow", () => {
+      ${scroll}
+      window.top.opener.postMessage({
+        commandType: "pageShow",
+        commandData: {
+          inputValue: document.getElementById("input").value,
+          scrollPosition: window.scrollY,
+        },
+      }, "*");
+    });
+    window.addEventListener("message", ({ data }) => {
+      if (data == "changeInputValue") {
+        document.getElementById("input").value = "1234";
+        window.top.opener.postMessage({
+          commandType: "onChangedInputValue",
+          commandData: {
+            historyLength: history.length,
+            inputValue: document.getElementById("input").value,
+          },
+        }, "*");
+      } else if (data == "loadNext") {
+        location.href += "&loadnext=1";
+      } else if (data == "back") {
+        history.back();
+      }
+    });
+  </script>
+</head>
+<body>
+<input type="text" id="input" value="initial"></input>
+<div style='height: 9000px;'></div>
+<p>
+</p>
+</body>
+</html>`
+  );
+}
diff --git a/docshell/test/mochitest/file_bug1742865_outer.sjs b/docshell/test/mochitest/file_bug1742865_outer.sjs
new file mode 100644
index 0000000000..bad8b23f00
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1742865_outer.sjs
@@ -0,0 +1,25 @@
+Cu.importGlobalProperties(["URLSearchParams"]);
+
+function handleRequest(request, response) {
+  response.write(
+    `<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("message", ({ data }) => {
+      if (data == "loadNext") {
+        location.href += "&loadnext=1";
+        return;
+      }
+      // Forward other messages to the frame.
+      document.getElementById("frame").contentWindow.postMessage(data, "*");
+    });
+  </script>
+</head>
+<body>
+  <iframe src="file_bug1742865.sjs?${request.queryString}" id="frame"></iframe>
+</body>
+</html>`
+  );
+}
diff --git a/docshell/test/mochitest/file_bug1743353.html b/docshell/test/mochitest/file_bug1743353.html
new file mode 100644
index 0000000000..c08f8d143f
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1743353.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("pageshow", () => {
+      let bc = new BroadcastChannel("bug1743353");
+      bc.addEventListener("message", ({ data: cmd }) => {
+        switch (cmd) {
+          case "load":
+            bc.close();
+            document.location += "?1";
+            break;
+          case "back":
+            window.blockBFCache = new RTCPeerConnection();
+            window.addEventListener("pagehide", () => {
+              bc.postMessage("pagehide");
+            });
+            window.addEventListener("unload", () => {
+              bc.postMessage("unload");
+              bc.close();
+            });
+            history.back();
+            break;
+          case "close":
+            bc.close();
+            window.close();
+            break;
+        }
+      });
+      bc.postMessage("pageshow");
+    });
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1747033.sjs b/docshell/test/mochitest/file_bug1747033.sjs
new file mode 100644
index 0000000000..14401101b2
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1747033.sjs
@@ -0,0 +1,110 @@
+"use strict";
+
+const BOUNDARY = "BOUNDARY";
+
+// waitForPageShow should be false if this is for multipart/x-mixed-replace
+// and it's not the last part, Gecko doesn't fire pageshow for those parts.
+function documentString(waitForPageShow = true) {
+  return `<html>
+  <head>
+    <script>
+      let bc = new BroadcastChannel("bug1747033");
+      bc.addEventListener("message", ({ data: { cmd, arg = undefined } }) => {
+        switch (cmd) {
+          case "load":
+            location.href = arg;
+            break;
+          case "replaceState":
+            history.replaceState({}, "Replaced state", arg);
+            bc.postMessage({ "historyLength": history.length, "location": location.href });
+            break;
+          case "back":
+            history.back();
+            break;
+          case "close":
+            close();
+            break;
+          }
+      });
+
+      function reply() {
+        bc.postMessage({ "historyLength": history.length, "location": location.href });
+      }
+
+      ${waitForPageShow ? `addEventListener("pageshow", reply);` : "reply();"}
+    </script>
+  </head>
+  <body></body>
+</html>
+`;
+}
+
+function boundary(last = false) {
+  let b = `--${BOUNDARY}`;
+  if (last) {
+    b += "--";
+  }
+  return b + "\n";
+}
+
+function sendMultipart(response, last = false) {
+  setState("sendMore", "");
+
+  response.write(`Content-Type: text/html
+
+${documentString(last)}
+`);
+  response.write(boundary(last));
+}
+
+function shouldSendMore() {
+  return new Promise(resolve => {
+    let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+    timer.initWithCallback(
+      () => {
+        let sendMore = getState("sendMore");
+        if (sendMore !== "") {
+          timer.cancel();
+          resolve(sendMore);
+        }
+      },
+      100,
+      Ci.nsITimer.TYPE_REPEATING_SLACK
+    );
+  });
+}
+
+async function handleRequest(request, response) {
+  if (request.queryString == "") {
+    // This is for non-multipart/x-mixed-replace loads.
+    response.write(documentString());
+    return;
+  }
+
+  if (request.queryString == "sendNextPart") {
+    setState("sendMore", "next");
+    return;
+  }
+
+  if (request.queryString == "sendLastPart") {
+    setState("sendMore", "last");
+    return;
+  }
+
+  response.processAsync();
+
+  response.setHeader(
+    "Content-Type",
+    `multipart/x-mixed-replace; boundary=${BOUNDARY}`,
+    false
+  );
+  response.setStatusLine(request.httpVersion, 200, "OK");
+
+  response.write(boundary());
+  sendMultipart(response);
+  while ((await shouldSendMore("sendMore")) !== "last") {
+    sendMultipart(response);
+  }
+  sendMultipart(response, true);
+  response.finish();
+}
diff --git a/docshell/test/mochitest/file_bug1773192_1.html b/docshell/test/mochitest/file_bug1773192_1.html
new file mode 100644
index 0000000000..42d5b3fced
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1773192_1.html
@@ -0,0 +1,13 @@
+<script>
+  let bc = new BroadcastChannel("bug1743353");
+  bc.addEventListener("message", ({ data }) => {
+    if (data == "next") {
+      location = "file_bug1773192_2.html";
+    } else if (data == "close") {
+      window.close();
+    }
+  });
+  window.addEventListener("pageshow", () => {
+    bc.postMessage({ location: location.href, referrer: document.referrer });
+  });
+</script>
diff --git a/docshell/test/mochitest/file_bug1773192_2.html b/docshell/test/mochitest/file_bug1773192_2.html
new file mode 100644
index 0000000000..3b1e5bcb28
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1773192_2.html
@@ -0,0 +1,13 @@
+<html>
+  <head>
+    <meta http-equiv="Cache-Control" content="no-cache, no-store">
+    <meta name="referrer" content="same-origin">
+  </head>
+  <body>
+    <form method="POST" action="file_bug1773192_3.sjs"></form>
+    <script>
+      history.replaceState({}, "", document.referrer);
+      document.forms[0].submit();
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/file_bug1773192_3.sjs b/docshell/test/mochitest/file_bug1773192_3.sjs
new file mode 100644
index 0000000000..ce889c7035
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1773192_3.sjs
@@ -0,0 +1,3 @@
+function handleRequest(request, response) {
+  response.write("<script>history.back();</script>");
+}
diff --git a/docshell/test/mochitest/file_bug385434_1.html b/docshell/test/mochitest/file_bug385434_1.html
new file mode 100644
index 0000000000..5c951f1fa6
--- /dev/null
+++ b/docshell/test/mochitest/file_bug385434_1.html
@@ -0,0 +1,29 @@
+<!--
+Inner frame for test of bug 385434.
+https://bugzilla.mozilla.org/show_bug.cgi?id=385434
+-->
+<html>
+<head>
+  <script type="application/javascript">
+    function hashchange() {
+      parent.onIframeHashchange();
+    }
+
+    function load() {
+      parent.onIframeLoad();
+    }
+
+    function scroll() {
+      parent.onIframeScroll();
+    }
+  </script>
+</head>
+
+<body onscroll="scroll()" onload="load()" onhashchange="hashchange()">
+<a href="#link1" id="link1">link1</a>
+<!-- Our parent loads us in an iframe with height 100px, so this spacer ensures
+     that switching between #link1 and #link2 causes us to scroll -->
+<div style="height:200px;"></div>
+<a href="#link2" id="link2">link2</a>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug385434_2.html b/docshell/test/mochitest/file_bug385434_2.html
new file mode 100644
index 0000000000..4aa5ef82b8
--- /dev/null
+++ b/docshell/test/mochitest/file_bug385434_2.html
@@ -0,0 +1,26 @@
+<!--
+Inner frame for test of bug 385434.
+https://bugzilla.mozilla.org/show_bug.cgi?id=385434
+-->
+<html>
+<head>
+  <script type="application/javascript">
+    function hashchange(e) {
+      // pass the event back to the parent so it can check its properties.
+      parent.gSampleEvent = e;
+
+      parent.statusMsg("Hashchange in 2.");
+      parent.onIframeHashchange();
+    }
+
+    function load() {
+      parent.statusMsg("Loading 2.");
+      parent.onIframeLoad();
+    }
+  </script>
+</head>
+
+<frameset onload="load()" onhashchange="hashchange(event)">
+  <frame src="about:blank" />
+</frameset>
+</html>
diff --git a/docshell/test/mochitest/file_bug385434_3.html b/docshell/test/mochitest/file_bug385434_3.html
new file mode 100644
index 0000000000..34dd68ef45
--- /dev/null
+++ b/docshell/test/mochitest/file_bug385434_3.html
@@ -0,0 +1,22 @@
+<!--
+Inner frame for test of bug 385434.
+https://bugzilla.mozilla.org/show_bug.cgi?id=385434
+-->
+<html>
+<head>
+  <script type="application/javascript">
+    // Notify our parent if we have a hashchange and once we're done loading.
+    window.addEventListener("hashchange", parent.onIframeHashchange);
+
+    window.addEventListener("DOMContentLoaded", function() {
+      // This also should trigger a hashchange, becuase the readystate is
+      // "interactive", not "complete" during DOMContentLoaded.
+      window.location.hash = "2";
+    });
+
+  </script>
+</head>
+
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug475636.sjs b/docshell/test/mochitest/file_bug475636.sjs
new file mode 100644
index 0000000000..cba9a968d6
--- /dev/null
+++ b/docshell/test/mochitest/file_bug475636.sjs
@@ -0,0 +1,97 @@
+let jsURL =
+  "javascript:" +
+  escape(
+    'window.parent.postMessage("JS uri ran", "*");\
+return \'\
+<script>\
+window.parent.postMessage("Able to access private: " +\
+  window.parent.private, "*");\
+</script>\''
+  );
+let dataURL =
+  "data:text/html," +
+  escape(
+    '<!DOCTYPE HTML>\
+<script>\
+try {\
+  window.parent.postMessage("Able to access private: " +\
+    window.parent.private, "*");\
+}\
+catch (e) {\
+  window.parent.postMessage("pass", "*");\
+}\
+</script>'
+  );
+
+let tests = [
+  // Plain document should work as normal
+  '<!DOCTYPE HTML>\
+<script>\
+try {\
+  window.parent.private;\
+  window.parent.postMessage("pass", "*");\
+}\
+catch (e) {\
+  window.parent.postMessage("Unble to access private", "*");\
+}\
+</script>',
+
+  // refresh to plain doc
+  { refresh: "file_bug475636.sjs?1", doc: "<!DOCTYPE HTML>" },
+
+  // meta-refresh to plain doc
+  '<!DOCTYPE HTML>\
+<head>\
+  <meta http-equiv="refresh" content="0; url=file_bug475636.sjs?1">\
+</head>',
+
+  // refresh to data url
+  { refresh: dataURL, doc: "<!DOCTYPE HTML>" },
+
+  // meta-refresh to data url
+  '<!DOCTYPE HTML>\
+<head>\
+  <meta http-equiv="refresh" content="0; url=' +
+    dataURL +
+    '">\
+</head>',
+
+  // refresh to js url should not be followed
+  {
+    refresh: jsURL,
+    doc: '<!DOCTYPE HTML>\
+<script>\
+setTimeout(function() {\
+  window.parent.postMessage("pass", "*");\
+}, 2000);\
+</script>',
+  },
+
+  // meta refresh to js url should not be followed
+  '<!DOCTYPE HTML>\
+<head>\
+  <meta http-equiv="refresh" content="0; url=' +
+    jsURL +
+    '">\
+</head>\
+<script>\
+setTimeout(function() {\
+  window.parent.postMessage("pass", "*");\
+}, 2000);\
+</script>',
+];
+
+function handleRequest(request, response) {
+  dump("@@@@@@@@@hi there: " + request.queryString + "\n");
+  let test = tests[parseInt(request.queryString, 10) - 1];
+  response.setHeader("Content-Type", "text/html");
+
+  if (!test) {
+    response.write('<script>parent.postMessage("done", "*");</script>');
+  } else if (typeof test == "string") {
+    response.write(test);
+  } else if (test.refresh) {
+    response.setHeader("Refresh", "0; url=" + test.refresh);
+    response.write(test.doc);
+  }
+}
diff --git a/docshell/test/mochitest/file_bug509055.html b/docshell/test/mochitest/file_bug509055.html
new file mode 100644
index 0000000000..ac30876bbf
--- /dev/null
+++ b/docshell/test/mochitest/file_bug509055.html
@@ -0,0 +1,9 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test inner frame for bug 509055</title>
+</head>
+<body onhashchange="hashchangeCallback()">
+  file_bug509055.html
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug511449.html b/docshell/test/mochitest/file_bug511449.html
new file mode 100644
index 0000000000..637732dbbf
--- /dev/null
+++ b/docshell/test/mochitest/file_bug511449.html
@@ -0,0 +1,6 @@
+<!DOCTYPE HTML>
+<title>Used in test for bug 511449</title>
+<input type="text" id="input">
+<script type="text/javascript">
+  document.getElementById("input").focus();
+</script>
diff --git a/docshell/test/mochitest/file_bug540462.html b/docshell/test/mochitest/file_bug540462.html
new file mode 100644
index 0000000000..ab8c07eba5
--- /dev/null
+++ b/docshell/test/mochitest/file_bug540462.html
@@ -0,0 +1,25 @@
+<html>
+  <head>
+    <script>
+    // <!--
+    function test() {
+      document.open();
+      document.write(
+      `<html>
+        <body onload='opener.documentWriteLoad(); rel();'>
+          <a href='foo.html'>foo</a>
+          <script>
+            function rel() { setTimeout('location.reload()', 0); }
+          <\/script>
+        </body>
+      </html>`
+      );
+      document.close();
+    }
+    // -->
+    </script>
+  </head>
+  <body onload="setTimeout('test()', 0)">
+    Test for bug 540462
+  </body>
+</html>
diff --git a/docshell/test/mochitest/file_bug580069_1.html b/docshell/test/mochitest/file_bug580069_1.html
new file mode 100644
index 0000000000..7ab4610334
--- /dev/null
+++ b/docshell/test/mochitest/file_bug580069_1.html
@@ -0,0 +1,8 @@
+<html>
+<body onload='parent.page1Load();'>
+file_bug580069_1.html
+
+<form id='form' action='file_bug580069_2.sjs' method='POST'></form>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug580069_2.sjs b/docshell/test/mochitest/file_bug580069_2.sjs
new file mode 100644
index 0000000000..ff03c74e68
--- /dev/null
+++ b/docshell/test/mochitest/file_bug580069_2.sjs
@@ -0,0 +1,8 @@
+function handleRequest(request, response) {
+  response.setHeader("Content-Type", "text/html", false);
+  response.write(
+    "<html><body onload='parent.page2Load(\"" +
+      request.method +
+      "\")'>file_bug580069_2.sjs</body></html>"
+  );
+}
diff --git a/docshell/test/mochitest/file_bug590573_1.html b/docshell/test/mochitest/file_bug590573_1.html
new file mode 100644
index 0000000000..b859ca7469
--- /dev/null
+++ b/docshell/test/mochitest/file_bug590573_1.html
@@ -0,0 +1,7 @@
+<html>
+<body onload='opener.page1Load();' onpageshow='opener.page1PageShow();'>
+
+<div style='height:10000px' id='div1'>This is a very tall div.</div>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug590573_2.html b/docshell/test/mochitest/file_bug590573_2.html
new file mode 100644
index 0000000000..5f9ca22be4
--- /dev/null
+++ b/docshell/test/mochitest/file_bug590573_2.html
@@ -0,0 +1,8 @@
+<html>
+<body onpopstate='opener.page2Popstate();' onload='opener.page2Load();'
+      onpageshow='opener.page2PageShow();'>
+
+<div style='height:300%' id='div2'>The second page also has a big div.</div>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug598895_1.html b/docshell/test/mochitest/file_bug598895_1.html
new file mode 100644
index 0000000000..d21f2b4a5d
--- /dev/null
+++ b/docshell/test/mochitest/file_bug598895_1.html
@@ -0,0 +1 @@
+<script>window.onload = function() { opener.postMessage("loaded", "*"); };</script><body>Should show</body>
diff --git a/docshell/test/mochitest/file_bug598895_2.html b/docshell/test/mochitest/file_bug598895_2.html
new file mode 100644
index 0000000000..680c9bf22b
--- /dev/null
+++ b/docshell/test/mochitest/file_bug598895_2.html
@@ -0,0 +1 @@
+<script>window.onload = function() { opener.postMessage("loaded", "*"); };</script><body></body>
diff --git a/docshell/test/mochitest/file_bug634834.html b/docshell/test/mochitest/file_bug634834.html
new file mode 100644
index 0000000000..3ff0897451
--- /dev/null
+++ b/docshell/test/mochitest/file_bug634834.html
@@ -0,0 +1,5 @@
+<html>
+<body>
+Nothing to see here; just an empty page.
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug637644_1.html b/docshell/test/mochitest/file_bug637644_1.html
new file mode 100644
index 0000000000..d21f2b4a5d
--- /dev/null
+++ b/docshell/test/mochitest/file_bug637644_1.html
@@ -0,0 +1 @@
+<script>window.onload = function() { opener.postMessage("loaded", "*"); };</script><body>Should show</body>
diff --git a/docshell/test/mochitest/file_bug637644_2.html b/docshell/test/mochitest/file_bug637644_2.html
new file mode 100644
index 0000000000..680c9bf22b
--- /dev/null
+++ b/docshell/test/mochitest/file_bug637644_2.html
@@ -0,0 +1 @@
+<script>window.onload = function() { opener.postMessage("loaded", "*"); };</script><body></body>
diff --git a/docshell/test/mochitest/file_bug640387.html b/docshell/test/mochitest/file_bug640387.html
new file mode 100644
index 0000000000..3a939fb41e
--- /dev/null
+++ b/docshell/test/mochitest/file_bug640387.html
@@ -0,0 +1,26 @@
+<html>
+<body onhashchange='hashchange()' onload='load()' onpopstate='popstate()'>
+
+<script>
+function hashchange() {
+  var f = (opener || parent).childHashchange;
+  if (f)
+    f();
+}
+
+function load() {
+  var f = (opener || parent).childLoad;
+  if (f)
+    f();
+}
+
+function popstate() {
+  var f = (opener || parent).childPopstate;
+  if (f)
+    f();
+}
+</script>
+
+Not much to see here...
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug653741.html b/docshell/test/mochitest/file_bug653741.html
new file mode 100644
index 0000000000..3202b52573
--- /dev/null
+++ b/docshell/test/mochitest/file_bug653741.html
@@ -0,0 +1,13 @@
+<html>
+<body onload='(parent || opener).childLoad()'>
+
+<div style='height:500px; background:yellow'>
+<a id='#top'>Top of the page</a>
+</div>
+
+<div id='bottom'>
+<a id='#bottom'>Bottom of the page</a>
+</div>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug660404 b/docshell/test/mochitest/file_bug660404
new file mode 100644
index 0000000000..ed773420ef
--- /dev/null
+++ b/docshell/test/mochitest/file_bug660404
@@ -0,0 +1,13 @@
+--testingtesting
+Content-Type: text/html
+
+<script>
+  var bc = new BroadcastChannel("bug660404_multipart");
+  bc.postMessage({command: "finishTest",
+    textContent: window.document.documentElement.textContent,
+    innerHTML: window.document.documentElement.innerHTML
+  });
+  bc.close();
+  window.close();
+</script>
+--testingtesting--
diff --git a/docshell/test/mochitest/file_bug660404-1.html b/docshell/test/mochitest/file_bug660404-1.html
new file mode 100644
index 0000000000..878bd80426
--- /dev/null
+++ b/docshell/test/mochitest/file_bug660404-1.html
@@ -0,0 +1,12 @@
+<script>
+  var bc = new BroadcastChannel("bug660404");
+  window.onload = function() {
+    setTimeout(() => {
+      window.onpagehide = function(ev) {
+        bc.postMessage({command: "pagehide", persisted: ev.persisted});
+        bc.close();
+      };
+      window.location.href = "file_bug660404";
+    }, 0);
+  };
+</script>
diff --git a/docshell/test/mochitest/file_bug660404^headers^ b/docshell/test/mochitest/file_bug660404^headers^
new file mode 100644
index 0000000000..5c821f3f48
--- /dev/null
+++ b/docshell/test/mochitest/file_bug660404^headers^
@@ -0,0 +1 @@
+Content-Type: multipart/x-mixed-replace; boundary="testingtesting"
diff --git a/docshell/test/mochitest/file_bug662170.html b/docshell/test/mochitest/file_bug662170.html
new file mode 100644
index 0000000000..3202b52573
--- /dev/null
+++ b/docshell/test/mochitest/file_bug662170.html
@@ -0,0 +1,13 @@
+<html>
+<body onload='(parent || opener).childLoad()'>
+
+<div style='height:500px; background:yellow'>
+<a id='#top'>Top of the page</a>
+</div>
+
+<div id='bottom'>
+<a id='#bottom'>Bottom of the page</a>
+</div>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug668513.html b/docshell/test/mochitest/file_bug668513.html
new file mode 100644
index 0000000000..ae417a35bd
--- /dev/null
+++ b/docshell/test/mochitest/file_bug668513.html
@@ -0,0 +1,101 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test file for Bug 668513</title>
+<script>
+  var SimpleTest = opener.SimpleTest;
+  var ok = opener.ok;
+  var is = opener.is;
+
+  function finish() {
+    SimpleTest.finish();
+    close();
+  }
+
+  function onload_test() {
+    var win = frames[0];
+    ok(win.performance, "Window.performance should be defined");
+    ok(win.performance.navigation, "Window.performance.navigation should be defined");
+    var navigation = win.performance && win.performance.navigation;
+    if (navigation === undefined) {
+      // avoid script errors
+      finish();
+      return;
+    }
+
+    // do this with a timeout to see the visuals of the navigations.
+    setTimeout(nav_frame, 100);
+  }
+
+  var step = 1;
+  function nav_frame() {
+    var navigation_frame = frames[0];
+    var navigation = navigation_frame.performance.navigation;
+    switch (step) {
+      case 1:
+      {
+        navigation_frame.location.href = "bug570341_recordevents.html";
+        step++;
+        break;
+      }
+      case 2:
+      {
+        is(navigation.type, navigation.TYPE_NAVIGATE,
+           "Expected window.performance.navigation.type == TYPE_NAVIGATE");
+        navigation_frame.history.back();
+        step++;
+        break;
+      }
+      case 3:
+      {
+        is(navigation.type, navigation.TYPE_BACK_FORWARD,
+           "Expected window.performance.navigation.type == TYPE_BACK_FORWARD");
+        step++;
+        navigation_frame.history.forward();
+        break;
+      }
+      case 4:
+      {
+        is(navigation.type, navigation.TYPE_BACK_FORWARD,
+           "Expected window.performance.navigation.type == TYPE_BACK_FORWARD");
+        navigation_frame.location.href = "bug668513_redirect.html";
+        step++;
+        break;
+      }
+      case 5:
+      {
+        is(navigation.type, navigation.TYPE_NAVIGATE,
+           "Expected timing.navigation.type as TYPE_NAVIGATE");
+        is(navigation.redirectCount, 1,
+           "Expected navigation.redirectCount == 1 on an server redirected navigation");
+
+        var timing = navigation_frame.performance && navigation_frame.performance.timing;
+        if (timing === undefined) {
+          // avoid script errors
+          finish();
+          break;
+        }
+        ok(timing.navigationStart > 0, "navigationStart should be > 0");
+        var sequence = ["navigationStart", "redirectStart", "redirectEnd", "fetchStart"];
+        for (var j = 1; j < sequence.length; ++j) {
+          var prop = sequence[j];
+          var prevProp = sequence[j - 1];
+          ok(timing[prevProp] <= timing[prop],
+             ["Expected ", prevProp, " to happen before ", prop,
+              ", got ", prevProp, " = ", timing[prevProp],
+              ", ", prop, " = ", timing[prop]].join(""));
+        }
+        step++;
+        finish();
+        break;
+      }
+    }
+  }
+</script>
+</head>
+<body>
+<div id="frames">
+<iframe name="child0" onload="onload_test();" src="navigation/blank.html"></iframe>
+</div>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug669671.sjs b/docshell/test/mochitest/file_bug669671.sjs
new file mode 100644
index 0000000000..5871419de8
--- /dev/null
+++ b/docshell/test/mochitest/file_bug669671.sjs
@@ -0,0 +1,17 @@
+function handleRequest(request, response) {
+  var count = parseInt(getState("count"));
+  if (!count || request.queryString == "countreset") {
+    count = 0;
+  }
+
+  setState("count", count + 1 + "");
+
+  response.setHeader("Content-Type", "text/html", false);
+  response.setHeader("Cache-Control", "max-age=0");
+  response.write(
+    '<html><body onload="opener.onChildLoad()" ' +
+      "onunload=\"parseInt('0')\">" +
+      count +
+      "</body></html>"
+  );
+}
diff --git a/docshell/test/mochitest/file_bug675587.html b/docshell/test/mochitest/file_bug675587.html
new file mode 100644
index 0000000000..842ab9ae79
--- /dev/null
+++ b/docshell/test/mochitest/file_bug675587.html
@@ -0,0 +1 @@
+<script>location.hash = "";</script>
diff --git a/docshell/test/mochitest/file_bug680257.html b/docshell/test/mochitest/file_bug680257.html
new file mode 100644
index 0000000000..ff480e96a5
--- /dev/null
+++ b/docshell/test/mochitest/file_bug680257.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <style type='text/css'>
+    a        { color: black; }
+    a:target { color: red; }
+  </style>
+</head>
+
+<body onload='(opener || parent).popupLoaded()'>
+
+<a id='a' href='#a'>link</a>
+<a id='b' href='#b'>link2</a>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_bug703855.html b/docshell/test/mochitest/file_bug703855.html
new file mode 100644
index 0000000000..fe15b6e3df
--- /dev/null
+++ b/docshell/test/mochitest/file_bug703855.html
@@ -0,0 +1,2 @@
+<!DOCTYPE html>
+<!-- Just need an empty file here, as long as it's served over HTTP -->
diff --git a/docshell/test/mochitest/file_bug728939.html b/docshell/test/mochitest/file_bug728939.html
new file mode 100644
index 0000000000..1cd52a44e1
--- /dev/null
+++ b/docshell/test/mochitest/file_bug728939.html
@@ -0,0 +1,3 @@
+<html>
+<body onload="opener.popupLoaded()">file_bug728939</body>
+</html>
diff --git a/docshell/test/mochitest/file_close_onpagehide1.html b/docshell/test/mochitest/file_close_onpagehide1.html
new file mode 100644
index 0000000000..ccf3b625a1
--- /dev/null
+++ b/docshell/test/mochitest/file_close_onpagehide1.html
@@ -0,0 +1,5 @@
+<script>
+  window.onload = () => {
+    opener.postMessage("initial", "*");
+  };
+</script>
diff --git a/docshell/test/mochitest/file_close_onpagehide2.html b/docshell/test/mochitest/file_close_onpagehide2.html
new file mode 100644
index 0000000000..a8e9479f47
--- /dev/null
+++ b/docshell/test/mochitest/file_close_onpagehide2.html
@@ -0,0 +1,5 @@
+<script>
+  window.onload = () => {
+    opener.postMessage("second", "*");
+  };
+</script>;
diff --git a/docshell/test/mochitest/file_compressed_multipart b/docshell/test/mochitest/file_compressed_multipart
new file mode 100644
index 0000000000..3c56226951
Binary files /dev/null and b/docshell/test/mochitest/file_compressed_multipart differ
diff --git a/docshell/test/mochitest/file_compressed_multipart^headers^ b/docshell/test/mochitest/file_compressed_multipart^headers^
new file mode 100644
index 0000000000..9376927812
--- /dev/null
+++ b/docshell/test/mochitest/file_compressed_multipart^headers^
@@ -0,0 +1,2 @@
+Content-Type: multipart/x-mixed-replace; boundary="testingtesting"
+Content-Encoding: gzip
diff --git a/docshell/test/mochitest/file_content_javascript_loads_frame.html b/docshell/test/mochitest/file_content_javascript_loads_frame.html
new file mode 100644
index 0000000000..9e2851aa8b
--- /dev/null
+++ b/docshell/test/mochitest/file_content_javascript_loads_frame.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<script type="application/javascript">
+"use strict";
+
+addEventListener("message", event => {
+  if ("ping" in event.data) {
+    event.source.postMessage({ pong: event.data.ping }, event.origin);
+  }
+});
+</script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_content_javascript_loads_root.html b/docshell/test/mochitest/file_content_javascript_loads_root.html
new file mode 100644
index 0000000000..b9f2c1faa7
--- /dev/null
+++ b/docshell/test/mochitest/file_content_javascript_loads_root.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<script type="application/javascript">
+"use strict";
+
+window.onload = () => {
+  opener.postMessage("ready", "*");
+};
+
+// eslint-disable-next-line no-shadow
+function promiseMessage(source, filter = event => true) {
+  return new Promise(resolve => {
+    function listener(event) {
+      if (event.source == source && filter(event)) {
+        removeEventListener("message", listener);
+        resolve(event);
+      }
+    }
+    addEventListener("message", listener);
+  });
+}
+
+// Sends a message to the given target window and waits for the response.
+function ping(target) {
+  let msg = { ping: Math.random() };
+  target.postMessage(msg, "*");
+  return promiseMessage(
+    target,
+    event => event.data && event.data.pong == msg.ping
+  );
+}
+
+function setFrameLocation(name, uri) {
+  window[name].location = uri;
+}
+</script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_form_restoration_no_store.html b/docshell/test/mochitest/file_form_restoration_no_store.html
new file mode 100644
index 0000000000..6e8756a693
--- /dev/null
+++ b/docshell/test/mochitest/file_form_restoration_no_store.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    window.addEventListener("pageshow", ({ persisted }) => {
+      let bc = new BroadcastChannel("form_restoration");
+      bc.addEventListener("message", ({ data }) => {
+        switch (data) {
+          case "enter_data":
+            document.getElementById("formElement").value = "test";
+            break;
+          case "reload":
+            bc.close();
+            location.reload();
+            break;
+          case "navigate":
+            bc.close();
+            document.location = "file_form_restoration_no_store.html?1";
+            break;
+          case "back":
+            bc.close();
+            history.back();
+            break;
+          case "close":
+            bc.close();
+            window.close();
+            break;
+        }
+      });
+      bc.postMessage({ persisted, formData: document.getElementById("formElement").value });
+    });
+  </script>
+</head>
+<body>
+  <input id="formElement" type="text" value="initial">
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_form_restoration_no_store.html^headers^ b/docshell/test/mochitest/file_form_restoration_no_store.html^headers^
new file mode 100644
index 0000000000..4030ea1d3d
--- /dev/null
+++ b/docshell/test/mochitest/file_form_restoration_no_store.html^headers^
@@ -0,0 +1 @@
+Cache-Control: no-store
diff --git a/docshell/test/mochitest/file_framedhistoryframes.html b/docshell/test/mochitest/file_framedhistoryframes.html
new file mode 100644
index 0000000000..314f9c72d8
--- /dev/null
+++ b/docshell/test/mochitest/file_framedhistoryframes.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+<iframe id="iframe" src="historyframes.html"></iframe>
+<script type="application/javascript">
+
+var SimpleTest = window.opener.SimpleTest;
+var is = window.opener.is;
+
+function done() {
+  window.opener.done();
+}
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/file_load_during_reload.html b/docshell/test/mochitest/file_load_during_reload.html
new file mode 100644
index 0000000000..600d5c1728
--- /dev/null
+++ b/docshell/test/mochitest/file_load_during_reload.html
@@ -0,0 +1,12 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <script>
+     function notifyOpener() {
+       opener.postMessage("loaded", "*");
+     }
+    </script>
+  </head>
+  <body onload="notifyOpener()">
+  </body>
+</html>
diff --git a/docshell/test/mochitest/file_pushState_after_document_open.html b/docshell/test/mochitest/file_pushState_after_document_open.html
new file mode 100644
index 0000000000..97a6954f2e
--- /dev/null
+++ b/docshell/test/mochitest/file_pushState_after_document_open.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<script>
+  document.addEventListener("DOMContentLoaded", function() {
+    document.open();
+    document.write("<!DOCTYPE html>New Document here");
+    document.close();
+    // Notify parent via postMessage, since otherwise exceptions will not get
+    // caught by its onerror handler.
+    parent.postMessage("doTest", "*");
+  });
+</script>
diff --git a/docshell/test/mochitest/file_redirect_history.html b/docshell/test/mochitest/file_redirect_history.html
new file mode 100644
index 0000000000..3971faf4fd
--- /dev/null
+++ b/docshell/test/mochitest/file_redirect_history.html
@@ -0,0 +1,18 @@
+<html>
+  <head>
+    <script>
+      function loaded() {
+        addEventListener("message", ({ data }) => {
+          document.getElementById("form").action = data;
+          document.getElementById("button").click();
+        }, { once: true });
+        opener.postMessage("loaded", "*");
+      }
+    </script>
+  </head>
+  <body onload="loaded();">
+    <form id="form" method="POST">
+      <input id="button" type="submit" />
+    </form>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/form_submit.sjs b/docshell/test/mochitest/form_submit.sjs
new file mode 100644
index 0000000000..1a1fa5d89c
--- /dev/null
+++ b/docshell/test/mochitest/form_submit.sjs
@@ -0,0 +1,40 @@
+"use strict";
+
+const CC = Components.Constructor;
+const BinaryInputStream = CC(
+  "@mozilla.org/binaryinputstream;1",
+  "nsIBinaryInputStream",
+  "setInputStream"
+);
+
+const BinaryOutputStream = CC(
+  "@mozilla.org/binaryoutputstream;1",
+  "nsIBinaryOutputStream",
+  "setOutputStream"
+);
+
+function log(str) {
+  // dump(`LOG: ${str}\n`);
+}
+
+async function handleRequest(request, response) {
+  if (request.method !== "POST") {
+    throw new Error("Expected a post request");
+  } else {
+    log("Reading request");
+    let available = 0;
+    let inputStream = new BinaryInputStream(request.bodyInputStream);
+    while ((available = inputStream.available()) > 0) {
+      log(inputStream.readBytes(available));
+    }
+  }
+
+  log("Setting Headers");
+  response.setHeader("Content-Type", "text/html", false);
+  response.setStatusLine(request.httpVersion, "200", "OK");
+  log("Writing body");
+  response.write(
+    '<script>"use strict"; let target = opener ? opener : parent; target.postMessage("done", "*");</script>'
+  );
+  log("Done");
+}
diff --git a/docshell/test/mochitest/form_submit_redirect.sjs b/docshell/test/mochitest/form_submit_redirect.sjs
new file mode 100644
index 0000000000..dbc32b9643
--- /dev/null
+++ b/docshell/test/mochitest/form_submit_redirect.sjs
@@ -0,0 +1,15 @@
+"use strict";
+
+Cu.importGlobalProperties(["URLSearchParams"]);
+
+async function handleRequest(request, response) {
+  if (request.method !== "POST") {
+    throw new Error("Expected a post request");
+  } else {
+    let params = new URLSearchParams(request.queryString);
+    let redirect = params.get("redirectTo");
+
+    response.setStatusLine(request.httpVersion, 302, "Moved Temporarily");
+    response.setHeader("Location", redirect);
+  }
+}
diff --git a/docshell/test/mochitest/historyframes.html b/docshell/test/mochitest/historyframes.html
new file mode 100644
index 0000000000..31f46a5071
--- /dev/null
+++ b/docshell/test/mochitest/historyframes.html
@@ -0,0 +1,176 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=602256
+-->
+<head>
+  <title>Test for Bug 602256</title>
+</head>
+<body onload="SimpleTest.executeSoon(run_test)">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=602256">Mozilla Bug 602256</a>
+<div id="content">
+  <iframe id="iframe" src="start_historyframe.html"></iframe>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 602256 */
+
+var testWin = window.opener ? window.opener : window.parent;
+
+var SimpleTest = testWin.SimpleTest;
+function is() { testWin.is.apply(testWin, arguments); }
+
+var gFrame = null;
+
+function gState() {
+  return location.hash.replace(/^#/, "");
+}
+
+function waitForLoad(aCallback) {
+  function listener() {
+    gFrame.removeEventListener("load", listener);
+    SimpleTest.executeSoon(aCallback);
+  }
+
+  gFrame.addEventListener("load", listener);
+}
+
+function loadContent(aURL, aCallback) {
+  waitForLoad(aCallback);
+
+  gFrame.src = aURL;
+}
+
+function getURL() {
+  return gFrame.contentDocument.documentURI;
+}
+
+function getContent() {
+  return gFrame.contentDocument.getElementById("text").textContent;
+}
+
+var BASE_URI = "http://mochi.test:8888/tests/docshell/test/mochitest/";
+var START = BASE_URI + "start_historyframe.html";
+var URL1 = BASE_URI + "url1_historyframe.html";
+var URL2 = BASE_URI + "url2_historyframe.html";
+
+function run_test() {
+  window.location.hash = "START";
+
+  gFrame = document.getElementById("iframe");
+
+  test_basic_inner_navigation();
+}
+
+function end_test() {
+  testWin.done();
+}
+
+var gTestContinuation = null;
+function continueAsync() {
+  setTimeout(function() { gTestContinuation.next(); })
+}
+
+function test_basic_inner_navigation() {
+  // Navigate the inner frame a few times
+  loadContent(URL1, function() {
+    is(getURL(), URL1, "URL should be correct");
+    is(getContent(), "Test1", "Page should be correct");
+
+    loadContent(URL2, function() {
+      is(getURL(), URL2, "URL should be correct");
+      is(getContent(), "Test2", "Page should be correct");
+
+      // Test that history is working
+      waitForLoad(function() {
+        is(getURL(), URL1, "URL should be correct");
+        is(getContent(), "Test1", "Page should be correct");
+
+        waitForLoad(function() {
+          is(getURL(), URL2, "URL should be correct");
+          is(getContent(), "Test2", "Page should be correct");
+
+          gTestContinuation = test_state_navigation();
+          gTestContinuation.next();
+        });
+        window.history.forward();
+      });
+      window.history.back();
+    });
+  });
+}
+
+function* test_state_navigation() {
+  window.location.hash = "STATE1";
+
+  is(getURL(), URL2, "URL should be correct");
+  is(getContent(), "Test2", "Page should be correct");
+
+  window.location.hash = "STATE2";
+
+  is(getURL(), URL2, "URL should be correct");
+  is(getContent(), "Test2", "Page should be correct");
+
+  window.addEventListener("popstate", (e) => {
+    continueAsync();
+  }, {once: true});
+  window.history.back();
+  yield;
+
+  is(gState(), "STATE1", "State should be correct after going back");
+  is(getURL(), URL2, "URL should be correct");
+  is(getContent(), "Test2", "Page should be correct");
+
+  window.addEventListener("popstate", (e) => {
+    continueAsync();
+  }, {once: true});
+  window.history.forward();
+  yield;
+
+  is(gState(), "STATE2", "State should be correct after going forward");
+  is(getURL(), URL2, "URL should be correct");
+  is(getContent(), "Test2", "Page should be correct");
+
+  window.addEventListener("popstate", (e) => {
+    continueAsync();
+  }, {once: true});
+  window.history.back();
+  yield;
+
+  window.addEventListener("popstate", (e) => {
+    continueAsync();
+  }, {once: true});
+  window.history.back();
+  yield;
+
+  is(gState(), "START", "State should be correct");
+  is(getURL(), URL2, "URL should be correct");
+  is(getContent(), "Test2", "Page should be correct");
+
+  waitForLoad(function() {
+    is(getURL(), URL1, "URL should be correct");
+    is(getContent(), "Test1", "Page should be correct");
+
+    waitForLoad(function() {
+      is(gState(), "START", "State should be correct");
+      is(getURL(), START, "URL should be correct");
+      is(getContent(), "Start", "Page should be correct");
+
+      end_test();
+    });
+
+    window.history.back();
+
+    is(gState(), "START", "State should be correct after going back twice");
+  });
+
+  window.history.back();
+  continueAsync();
+  yield;
+  is(gState(), "START", "State should be correct");
+}
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/mochitest.ini b/docshell/test/mochitest/mochitest.ini
new file mode 100644
index 0000000000..598d629673
--- /dev/null
+++ b/docshell/test/mochitest/mochitest.ini
@@ -0,0 +1,209 @@
+[DEFAULT]
+support-files =
+  bug404548-subframe.html
+  bug404548-subframe_window.html
+  bug413310-post.sjs
+  bug413310-subframe.html
+  bug529119-window.html
+  bug570341_recordevents.html
+  bug668513_redirect.html
+  bug668513_redirect.html^headers^
+  bug691547_frame.html
+  dummy_page.html
+  file_anchor_scroll_after_document_open.html
+  file_bfcache_plus_hash_1.html
+  file_bfcache_plus_hash_2.html
+  file_bug385434_1.html
+  file_bug385434_2.html
+  file_bug385434_3.html
+  file_bug475636.sjs
+  file_bug509055.html
+  file_bug540462.html
+  file_bug580069_1.html
+  file_bug580069_2.sjs
+  file_bug598895_1.html
+  file_bug598895_2.html
+  file_bug590573_1.html
+  file_bug590573_2.html
+  file_bug634834.html
+  file_bug637644_1.html
+  file_bug637644_2.html
+  file_bug640387.html
+  file_bug653741.html
+  file_bug660404
+  file_bug660404^headers^
+  file_bug660404-1.html
+  file_bug662170.html
+  file_bug669671.sjs
+  file_bug680257.html
+  file_bug703855.html
+  file_bug728939.html
+  file_bug1121701_1.html
+  file_bug1121701_2.html
+  file_bug1186774.html
+  file_bug1151421.html
+  file_bug1450164.html
+  file_close_onpagehide1.html
+  file_close_onpagehide2.html
+  file_compressed_multipart
+  file_compressed_multipart^headers^
+  file_pushState_after_document_open.html
+  historyframes.html
+  ping.html  
+  start_historyframe.html
+  url1_historyframe.html
+  url2_historyframe.html
+
+[test_anchor_scroll_after_document_open.html]
+[test_bfcache_plus_hash.html]
+[test_bug1422334.html]
+support-files =
+  bug1422334_redirect.html
+  bug1422334_redirect.html^headers^
+  !/docshell/test/navigation/blank.html
+[test_bug385434.html]
+[test_bug387979.html]
+[test_bug402210.html]
+skip-if =
+  http3
+[test_bug404548.html]
+[test_bug413310.html]
+skip-if = true
+# Disabled for too many intermittent failures (bug 719186)
+[test_bug475636.html]
+[test_bug509055.html]
+[test_bug511449.html]
+skip-if = toolkit != "cocoa" || headless # Headless: bug 1410525
+support-files = file_bug511449.html
+[test_bug529119-1.html]
+skip-if =
+  fission && os == "android" # Bug 1827321
+[test_bug529119-2.html]
+skip-if =
+  http3
+  fission && os == "android" # Bug 1827321
+[test_bug530396.html]
+support-files = bug530396-noref.sjs bug530396-subframe.html
+skip-if =
+  http3
+[test_bug540462.html]
+skip-if = toolkit == 'android' && debug
+[test_bug551225.html]
+[test_bug570341.html]
+skip-if = (verify && !debug && (os == 'win'))
+[test_bug580069.html]
+skip-if = (verify && !debug && (os == 'win'))
+[test_bug590573.html]
+[test_bug598895.html]
+[test_bug634834.html]
+skip-if =
+  http3
+[test_bug637644.html]
+[test_bug640387_1.html]
+[test_bug640387_2.html]
+[test_bug653741.html]
+[test_bug660404.html]
+[test_bug662170.html]
+[test_bug668513.html]
+support-files = file_bug668513.html
+[test_bug669671.html]
+[test_bug675587.html]
+support-files = file_bug675587.html
+[test_bug680257.html]
+[test_bug691547.html]
+[test_bug694612.html]
+[test_bug703855.html]
+[test_bug728939.html]
+[test_bug797909.html]
+[test_bug1045096.html]
+[test_bug1121701.html]
+[test_bug1151421.html]
+[test_bug1186774.html]
+[test_bug1450164.html]
+[test_bug1507702.html]
+[test_bug1645781.html]
+support-files =
+  form_submit.sjs
+skip-if =
+  http3
+[test_bug1729662.html]
+support-files =
+  file_bug1729662.html
+[test_bug1740516.html]
+support-files =
+  file_bug1740516_1.html
+  file_bug1740516_1_inner.html
+  file_bug1740516_2.html
+[test_form_restoration.html]
+support-files =
+  file_form_restoration_no_store.html
+  file_form_restoration_no_store.html^headers^
+[test_bug1741132.html]
+support-files =
+  file_bug1741132.html
+skip-if = toolkit == "android" && !sessionHistoryInParent
+[test_bug1742865.html]
+support-files =
+  file_bug1742865.sjs
+  file_bug1742865_outer.sjs
+skip-if =
+  toolkit == "android" && debug && fission && verify # Bug 1745937
+  http3
+[test_bug1743353.html]
+support-files =
+  file_bug1743353.html
+[test_bug1747033.html]
+support-files =
+  file_bug1747033.sjs
+skip-if =
+  http3
+[test_bug1773192.html]
+support-files =
+  file_bug1773192_1.html
+  file_bug1773192_2.html
+  file_bug1773192_3.sjs
+[test_close_onpagehide_by_history_back.html]
+[test_close_onpagehide_by_window_close.html]
+[test_compressed_multipart.html]
+[test_content_javascript_loads.html]
+support-files =
+  file_content_javascript_loads_root.html
+  file_content_javascript_loads_frame.html
+skip-if =
+  http3
+[test_forceinheritprincipal_overrule_owner.html]
+skip-if =
+  http3
+[test_framedhistoryframes.html]
+support-files = file_framedhistoryframes.html
+skip-if =
+  http3
+[test_load_during_reload.html]
+support-files = file_load_during_reload.html
+[test_pushState_after_document_open.html]
+[test_navigate_after_pagehide.html]
+skip-if =
+  http3
+[test_redirect_history.html]
+support-files =
+  file_redirect_history.html
+  form_submit_redirect.sjs
+skip-if =
+  http3
+[test_windowedhistoryframes.html]
+skip-if =
+  (!debug && os == 'android') # Bug 1573892
+  http3
+[test_triggeringprincipal_location_seturi.html]
+skip-if =
+  http3
+[test_double_submit.html]
+support-files =
+  clicker.html
+  double_submit.sjs
+skip-if =
+  http3
+[test_iframe_srcdoc_to_remote.html]
+skip-if =
+  http3
+[test_javascript_sandboxed_popup.html]
diff --git a/docshell/test/mochitest/ping.html b/docshell/test/mochitest/ping.html
new file mode 100644
index 0000000000..7d84560dd1
--- /dev/null
+++ b/docshell/test/mochitest/ping.html
@@ -0,0 +1,6 @@
+<!doctype html>
+<script>
+  "use strict";
+  let target = (window.opener || window.parent);
+  target.postMessage("ping", "*");
+</script>
diff --git a/docshell/test/mochitest/start_historyframe.html b/docshell/test/mochitest/start_historyframe.html
new file mode 100644
index 0000000000..a791af4e64
--- /dev/null
+++ b/docshell/test/mochitest/start_historyframe.html
@@ -0,0 +1 @@
+<p id='text'>Start</p>
diff --git a/docshell/test/mochitest/test_anchor_scroll_after_document_open.html b/docshell/test/mochitest/test_anchor_scroll_after_document_open.html
new file mode 100644
index 0000000000..5309f6cf19
--- /dev/null
+++ b/docshell/test/mochitest/test_anchor_scroll_after_document_open.html
@@ -0,0 +1,55 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=881487
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 881487</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 881487 */
+  SimpleTest.waitForExplicitFinish();
+  // Child needs to invoke us, otherwise our onload will fire before the child
+  // has done the write/close bit.
+  var gotOnload = false;
+  addLoadEvent(function() {
+    gotOnload = true;
+  });
+  onmessage = function handleMessage(msg) {
+    if (msg.data == "doTest") {
+      if (!gotOnload) {
+        addLoadEvent(function() { handleMessage(msg); });
+        return;
+      }
+      frames[0].onscroll = function() {
+        ok(true, "Got a scroll event");
+        SimpleTest.finish();
+      };
+      frames[0].location.hash = "#target";
+      return;
+    }
+    if (msg.data == "haveHash") {
+      ok(false, "Child got reloaded");
+    } else {
+      ok(false, "Unexpected message");
+    }
+    SimpleTest.finish();
+  };
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=881487">Mozilla Bug 881487</a>
+<p id="display">
+  <!-- iframe goes here so it can scroll -->
+<iframe src="file_anchor_scroll_after_document_open.html"></iframe>
+</p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bfcache_plus_hash.html b/docshell/test/mochitest/test_bfcache_plus_hash.html
new file mode 100644
index 0000000000..cb5bc06f21
--- /dev/null
+++ b/docshell/test/mochitest/test_bfcache_plus_hash.html
@@ -0,0 +1,153 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=646641
+-->
+<head>
+  <title>Test for Bug 646641</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=646641">Mozilla Bug 646641</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 646641 */
+
+/**
+ * Steps:
+ * - Main page (this one) opens file_bfcache_plus_hash_1.html (subpage 1)
+ * - subpage 1 sends msg { "childLoad", 1 }
+ * - subpage 1 sends msg { "childPageshow", 1 }
+ * - main page sends message "pushState"
+ * - subpage 1 does pushState()
+ * - subpage 1 navigates to file_bfcache_plus_hash_2.html (subpage 2)
+ * - subpage 2 sends msg { "childLoad", 2 }
+ * - subpage 2 sends msg { "childPageshow", 2 }
+ * - main page sends msg "go-2"
+ * - subpage 2 goes back two history entries
+ * - subpage 1 sends msg  { "childPageshow", 1 }
+ *  - Receiving only this msg shows we have retrieved the document from bfcache
+ * - main page sends msg "close"
+ * - subpage 1 sends msg "closed"
+ */
+SimpleTest.waitForExplicitFinish();
+
+function debug(msg) {
+  // Wrap dump so we can turn debug messages on and off easily.
+  dump(msg + "\n");
+}
+
+var expectedLoadNum = -1;
+var expectedPageshowNum = -1;
+
+function waitForLoad(n) {
+  debug("Waiting for load " + n);
+  expectedLoadNum = n;
+}
+
+function waitForShow(n) {
+  debug("Waiting for show " + n);
+  expectedPageshowNum = n;
+}
+
+
+
+function executeTest() {
+  function* test() {
+    window.open("file_bfcache_plus_hash_1.html", "", "noopener");
+    waitForLoad(1);
+    waitForShow(1);
+    yield undefined;
+    yield undefined;
+
+    bc1.postMessage("pushState");
+
+    waitForLoad(2);
+    waitForShow(2);
+    yield undefined;
+    yield undefined;
+
+    // Now go back 2.  The first page should be retrieved from bfcache.
+    bc2.postMessage("go-2");
+    waitForShow(1);
+    yield undefined;
+
+    bc1.postMessage("close");
+  }
+
+  var bc1 = new BroadcastChannel("bug646641_1");
+  var bc2 = new BroadcastChannel("bug646641_2");
+  bc1.onmessage = (msgEvent) => {
+    var msg = msgEvent.data.message;
+    var n = msgEvent.data.num;
+    if (msg == "childLoad") {
+      if (n == expectedLoadNum) {
+        debug("Got load " + n);
+        expectedLoadNum = -1;
+
+        // Spin the event loop before calling gGen.next() so the generator runs
+        // outside the onload handler.  This prevents us from encountering all
+        // sorts of docshell quirks.
+        setTimeout(function() { gGen.next(); }, 0);
+      } else {
+        debug("Got unexpected load " + n);
+        ok(false, "Got unexpected load " + n);
+      }
+    } else if (msg == "childPageshow") {
+      if (n == expectedPageshowNum) {
+        debug("Got expected pageshow " + n);
+        expectedPageshowNum = -1;
+        ok(true, "Got expected pageshow " + n);
+        setTimeout(function() { gGen.next(); }, 0);
+      } else {
+        debug("Got unexpected pageshow " + n);
+        ok(false, "Got unexpected pageshow " + n);
+      }
+    } else if (msg == "closed") {
+      bc1.close();
+      bc2.close();
+      SimpleTest.finish();
+    }
+  }
+
+  bc2.onmessage = bc1.onmessage;
+
+  var gGen = test();
+
+  // If Fission is disabled, the pref is no-op.
+  SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+    gGen.next();
+  });
+}
+if (isXOrigin) {
+  // Bug 1746646: Make mochitests work with TCP enabled (cookieBehavior = 5)
+  // Acquire storage access permission here so that the BroadcastChannel used to
+  // communicate with the opened windows works in xorigin tests. Otherwise,
+  // the iframe containing this page is isolated from first-party storage access,
+  // which isolates BroadcastChannel communication.
+  SpecialPowers.wrap(document).notifyUserGestureActivation();
+  SpecialPowers.addPermission("storageAccessAPI", true, window.location.href).then(() => {
+    SpecialPowers.wrap(document).requestStorageAccess().then(() => {
+      SpecialPowers.pushPrefEnv({
+        set: [["privacy.partition.always_partition_third_party_non_cookie_storage", false]],
+      }).then(() => {
+        executeTest();
+      });
+    });
+  });
+} else {
+  executeTest();
+}
+
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1045096.html b/docshell/test/mochitest/test_bug1045096.html
new file mode 100644
index 0000000000..2df2232b7e
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1045096.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1045096
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1045096</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1045096">Mozilla Bug 1045096</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  /** Test for Bug 1045096 */
+  var i = document.createElement("iframe");
+  i.src = "javascript:false"; // This is required!
+  $("content").appendChild(i);
+  ok(i.contentWindow.performance, "Should have a performance object");
+  </script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1121701.html b/docshell/test/mochitest/test_bug1121701.html
new file mode 100644
index 0000000000..cd0b2529d4
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1121701.html
@@ -0,0 +1,108 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1121701
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1121701</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 1121701 */
+  SimpleTest.waitForExplicitFinish();
+
+  var testUrl1 = "file_bug1121701_1.html";
+  var testUrl2 = "file_bug1121701_2.html";
+
+  var page1LoadCount = 0;
+  let page1Done = {};
+  page1Done.promise = new Promise(resolve => {
+    page1Done.resolve = resolve;
+  });
+  let page2Done = {};
+  page2Done.promise = new Promise(resolve => {
+    page2Done.resolve = resolve;
+  });
+
+  addLoadEvent(async function() {
+
+    // Bug 1746646: Make mochitests work with TCP enabled (cookieBehavior = 5)
+    // Acquire storage access permission here so that the BroadcastChannel used to
+    // communicate with the opened windows works in xorigin tests. Otherwise,
+    // the iframe containing this page is isolated from first-party storage access,
+    // which isolates BroadcastChannel communication.
+    if (isXOrigin) {
+      await SpecialPowers.pushPrefEnv({
+        set: [["privacy.partition.always_partition_third_party_non_cookie_storage", false]],
+      });
+      SpecialPowers.wrap(document).notifyUserGestureActivation();
+      await SpecialPowers.addPermission("storageAccessAPI", true, window.location.href);
+      await SpecialPowers.wrap(document).requestStorageAccess();
+    }
+
+    var bc = new BroadcastChannel("file_bug1121701_1");
+    var bc2 = new BroadcastChannel("file_bug1121701_2");
+
+    async function scheduleFinish() {
+      await Promise.all([page1Done.promise, page2Done.promise]);
+      bc2.close();
+      bc.close();
+      SimpleTest.finish();
+    }
+
+    bc.onmessage = (msgEvent) => {
+      var msg = msgEvent.data;
+      var command = msg.command;
+      if (command == "child1PageShow") {
+        ++page1LoadCount;
+        var persisted = msg.persisted;
+        var pageHideAsserts = msg.pageHideAsserts;
+        if (pageHideAsserts) {
+          ok(pageHideAsserts.persisted, "onpagehide: test page 1 should get persisted");
+          is(pageHideAsserts.innerHTML, "modified",  "onpagehide: innerHTML text is 'modified'");
+        }
+        if (page1LoadCount == 1) {
+          SimpleTest.executeSoon(function() {
+            is(persisted, false, "Initial page load shouldn't be persisted.");
+            bc.postMessage({command: "setInnerHTML", testUrl2});
+          });
+        } else if (page1LoadCount == 2) {
+          is(persisted, true, "Page load from bfcache should be persisted.");
+          is(msg.innerHTML, "modified", "innerHTML text is 'modified'");
+          bc.postMessage({command: "close"});
+        }
+      } else if (command == "closed") {
+        page1Done.resolve();
+      }
+    }
+    bc2.onmessage = (msgEvent) => {
+      var msg = msgEvent.data;
+      var command = msg.command;
+      if (command == "child2PageShow") {
+        bc2.postMessage({command: "setInnerHTML", location: location.href});
+      } else if (command == "onmessage") {
+        page2Done.resolve();
+      }
+    }
+
+    scheduleFinish();
+    // If Fission is disabled, the pref is no-op.
+    SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+      window.open(testUrl1, "", "noopener");
+    });
+  });
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1121701">Mozilla Bug 1121701</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1151421.html b/docshell/test/mochitest/test_bug1151421.html
new file mode 100644
index 0000000000..0738ee783e
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1151421.html
@@ -0,0 +1,61 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1151421
+-->
+<head>
+  <title>Test for Bug 1151421</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1151421">Mozilla Bug 1151421</a>
+
+<script type="application/javascript">
+
+/** Test for Bug 1151421 */
+SimpleTest.waitForExplicitFinish();
+
+function childLoad() {
+  // Spin the event loop so we leave the onload handler.
+  SimpleTest.executeSoon(childLoad2);
+}
+
+function childLoad2() {
+  let iframe = document.getElementById("iframe");
+  let cw = iframe.contentWindow;
+  let content = cw.document.getElementById("content");
+
+  // Create a function to calculate an invariant.
+  let topPlusOffset = function() {
+    return Math.round(content.getBoundingClientRect().top + cw.pageYOffset);
+  };
+
+  let initialTPO = topPlusOffset();
+
+  // Scroll the iframe to various positions, and check the TPO.
+  // Scrolling down to the bottom will adjust the page offset by a fractional amount.
+  let positions = [-100, 0.17, 0, 1.5, 10.41, 1e6, 12.1];
+
+  // Run some tests with scrollTo() and ensure we have the same invariant after scrolling.
+  positions.forEach(function(pos) {
+    cw.scrollTo(0, pos);
+    is(topPlusOffset(), initialTPO, "Top plus offset should remain invariant across scrolling.");
+  });
+
+  positions.reverse().forEach(function(pos) {
+    cw.scrollTo(0, pos);
+    is(topPlusOffset(), initialTPO, "(reverse) Top plus offset should remain invariant across scrolling.");
+  });
+
+  SimpleTest.finish();
+}
+
+</script>
+
+<!-- When the iframe loads, it calls childLoad(). -->
+<br>
+<iframe height='100px' id='iframe' src='file_bug1151421.html'></iframe>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1186774.html b/docshell/test/mochitest/test_bug1186774.html
new file mode 100644
index 0000000000..9ec56baf11
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1186774.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1186774
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1186774</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 1186774 */
+
+var child;
+
+function runTest() {
+  child = window.open("file_bug1186774.html", "", "width=100,height=100");
+  child.onload = function() {
+    setTimeout(function() {
+      child.scrollTo(0, 0);
+      child.history.pushState({}, "initial");
+      child.scrollTo(0, 3000);
+      child.history.pushState({}, "scrolled");
+      child.scrollTo(0, 6000);
+      child.history.back();
+    });
+  };
+
+  child.onpopstate = function() {
+    is(Math.round(child.scrollY), 6000, "Shouldn't have scrolled before popstate");
+    child.close();
+    SimpleTest.finish();
+  };
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(runTest);
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1186774">Mozilla Bug 1186774</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1422334.html b/docshell/test/mochitest/test_bug1422334.html
new file mode 100644
index 0000000000..b525ae1d9c
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1422334.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Ensure that reload after replaceState after 3xx redirect does the right thing.</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    addLoadEvent(function() {
+      var ifr = document.querySelector("iframe");
+      var win = ifr.contentWindow;
+      is(win.location.href, location.href.replace(location.search, "")
+                            .replace("mochitest/test_bug1422334.html",
+                            "navigation/blank.html?x=y"),
+         "Should have the right location on initial load");
+
+      win.history.replaceState(null, '', win.location.pathname);
+      is(win.location.href, location.href.replace(location.search, "")
+                            .replace("mochitest/test_bug1422334.html",
+                            "navigation/blank.html"),
+         "Should have the right location after replaceState call");
+
+      ifr.onload = function() {
+        is(win.location.href, location.href.replace(location.search, "")
+                              .replace("mochitest/test_bug1422334.html",
+                              "navigation/blank.html"),
+           "Should have the right location after reload");
+        SimpleTest.finish();
+      }
+      win.location.reload();
+    });
+  </script>
+</head>
+<body>
+<p id="display"><iframe src="bug1422334_redirect.html"></iframe></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1450164.html b/docshell/test/mochitest/test_bug1450164.html
new file mode 100644
index 0000000000..546a988394
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1450164.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+  <!--
+       https://bugzilla.mozilla.org/show_bug.cgi?id=1450164
+  -->
+  <head>
+    <meta charset="utf-8">
+    <title>Test for Bug 1450164</title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+    <script type="application/javascript">
+
+     /** Test for Bug 1450164 */
+
+     function runTest() {
+       var child = window.open("file_bug1450164.html", "", "width=100,height=100");
+       child.onload = function() {
+         // After the window loads, close it. If we don't crash in debug, consider that a pass.
+         child.close();
+       };
+     }
+
+     SimpleTest.waitForExplicitFinish();
+     addLoadEvent(runTest);
+
+    </script>
+  </head>
+  <body>
+    <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1450164">Mozilla Bug 1450164</a>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1507702.html b/docshell/test/mochitest/test_bug1507702.html
new file mode 100644
index 0000000000..fd88ee60a5
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1507702.html
@@ -0,0 +1,57 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1507702
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1507702</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <link rel="icon" href="about:crashparent"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1507702">Mozilla Bug 1507702</a>
+<img src="about:crashparent">
+<img src="about:crashcontent">
+<iframe src="about:crashparent"></iframe>
+<iframe src="about:crashcontent"></iframe>
+<script>
+  let urls = ["about:crashparent", "about:crashcontent"];
+  async function testFetch() {
+    const url = urls.shift();
+    if (!url) {
+      return Promise.resolve();
+    }
+
+    let threw;
+    try {
+      await fetch(url);
+      threw = false;
+    } catch (e) {
+      threw = true;
+    }
+
+    ok(threw === true, "fetch should reject");
+    return testFetch();
+  }
+
+  document.body.onload = async () => {
+    for (const url of ["about:crashparent", "about:crashcontent"]) {
+      SimpleTest.doesThrow(() => {
+        top.location.href = url;
+      }, "navigation should throw");
+
+      SimpleTest.doesThrow(() => {
+        location.href = url;
+      }, "navigation should throw");
+    }
+
+    await testFetch();
+    SimpleTest.finish();
+  };
+
+  SimpleTest.waitForExplicitFinish();
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1645781.html b/docshell/test/mochitest/test_bug1645781.html
new file mode 100644
index 0000000000..6cf676b7a9
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1645781.html
@@ -0,0 +1,90 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Test for Bug 1590762</title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <body>
+    <form id="form" action="form_submit.sjs" method="POST" target="targetFrame">
+      <input id="input" type="text" name="name" value="">
+      <input id="button" type="submit">
+    </form>
+    <script>
+      "use strict";
+      const PATH = "/tests/docshell/test/mochitest/";
+      const SAME_ORIGIN = new URL(PATH, window.location.origin);;
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      const CROSS_ORIGIN_1 = new URL(PATH, "http://test1.example.com/");
+      const CROSS_ORIGIN_2 = new URL(PATH, "https://example.com/");
+      const TARGET = "ping.html";
+      const ACTION = "form_submit.sjs";
+
+      function generateBody(size) {
+        let data = new Uint8Array(size);
+        for (let i = 0; i < size; ++i) {
+          data[i] = 97 + Math.random() * (123 - 97);
+        }
+
+        return new TextDecoder().decode(data);
+      }
+
+      async function withFrame(url) {
+        info("Creating frame");
+        let frame = document.createElement('iframe');
+        frame.name = "targetFrame";
+
+        return new Promise(resolve => {
+          addEventListener('message', async function({source}) {
+            info("Frame loaded");
+            if (frame.contentWindow == source) {
+              resolve(frame);
+            }
+          }, { once: true });
+          frame.src = url;
+          document.body.appendChild(frame);
+        });
+      }
+
+      function click() {
+        synthesizeMouse(document.getElementById('button'), 5, 5, {});
+      }
+
+      function* spec() {
+        let urls = [SAME_ORIGIN, CROSS_ORIGIN_1, CROSS_ORIGIN_2];
+        for (let action of urls) {
+          for (let target of urls) {
+            yield { action: new URL(ACTION, action),
+                    target: new URL(TARGET, target) };
+          }
+        }
+      }
+
+      info("Starting tests");
+      let form = document.getElementById('form');
+
+      // The body of the POST needs to be large to trigger this.
+      // 1024*1024 seems to be enough, but scaling to get a margin.
+      document.getElementById('input').value = generateBody(1024*1024);
+      for (let { target, action } of spec()) {
+        add_task(async function runTest() {
+          info(`Running test ${target} with ${action}`);
+          form.action = action;
+          let frame = await withFrame(target);
+          await new Promise(resolve => {
+            addEventListener('message', async function() {
+              info("Form loaded");
+              frame.remove();
+              resolve();
+            }, { once: true });
+
+            click();
+          });
+
+          ok(true, `Submitted to ${origin} with target ${action}`)
+        });
+      };
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1729662.html b/docshell/test/mochitest/test_bug1729662.html
new file mode 100644
index 0000000000..ec43508494
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1729662.html
@@ -0,0 +1,76 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test back/forward after pushState</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    SimpleTest.requestFlakyTimeout("Need to wait to make sure an event does not fire");
+
+    async function runTest() {
+      let win = window.open();
+      let goneBackAndForwardOnce = new Promise((resolve) => {
+        let timeoutID;
+
+        // We should only get one load event in win.
+        let bc = new BroadcastChannel("bug1729662");
+        bc.addEventListener("message", () => {
+          bc.addEventListener("message", () => {
+            clearTimeout(timeoutID);
+            resolve(false);
+          });
+        }, { once: true });
+
+        let goneBack = false, goneForward = false;
+        win.addEventListener("popstate", ({ state }) => {
+          // We should only go back and forward once, if we get another
+          // popstate after that then we should fall through to the
+          // failure case below.
+          if (!(goneBack && goneForward)) {
+            // Check if this is the popstate for the forward (the one for
+            // back will have state == undefined).
+            if (state == 1) {
+              ok(goneBack, "We should have gone back before going forward");
+
+              goneForward = true;
+
+              // Wait a bit to make sure there are no more popstate events.
+              // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+              timeoutID = setTimeout(resolve, 1000, true);
+
+              return;
+            }
+
+            // Check if we've gone back once before, if we get another
+            // popstate after that then we should fall through to the
+            // failure case below.
+            if (!goneBack) {
+              goneBack = true;
+
+              return;
+            }
+          }
+
+          clearTimeout(timeoutID);
+          resolve(false);
+        });
+      });
+
+      win.location = "file_bug1729662.html";
+
+      ok(await goneBackAndForwardOnce, "Stopped navigating history");
+
+      win.close();
+
+      SimpleTest.finish();
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1740516.html b/docshell/test/mochitest/test_bug1740516.html
new file mode 100644
index 0000000000..b54932c736
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1740516.html
@@ -0,0 +1,79 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test pageshow event order for iframe</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    function waitForPageShow(outer, inner) {
+      return new Promise((resolve) => {
+        let results = [];
+        outer.addEventListener("message", ({ data: persisted }) => {
+          results.push({ name: outer.name, persisted });
+          if (results.length == 2) {
+            resolve(results);
+          }
+        }, { once: true });
+        inner.addEventListener("message", ({ data: persisted }) => {
+          results.push({ name: inner.name, persisted });
+          if (results.length == 2) {
+            resolve(results);
+          }
+        }, { once: true });
+      });
+    }
+    async function runTest() {
+      let outerBC = new BroadcastChannel("bug1740516_1");
+      let innerBC = new BroadcastChannel("bug1740516_1_inner");
+
+      let check = waitForPageShow(outerBC, innerBC).then(([first, second]) => {
+        is(first.name, "bug1740516_1_inner", "Should get pageShow from inner iframe page first.");
+        ok(!first.persisted, "First navigation shouldn't come from BFCache.");
+        is(second.name, "bug1740516_1", "Should get pageShow from outer page second.");
+        ok(!second.persisted, "First navigation shouldn't come from BFCache.");
+      }, () => {
+        ok(false, "The promises should not be rejected.");
+      });
+      window.open("file_bug1740516_1.html", "", "noopener");
+      await check;
+
+      check = waitForPageShow(outerBC, innerBC).then(([first, second]) => {
+        is(first.name, "bug1740516_1_inner", "Should get pageShow from inner iframe page first.");
+        ok(first.persisted, "Second navigation should come from BFCache");
+        is(second.name, "bug1740516_1", "Should get pageShow from outer page second.");
+        ok(second.persisted, "Second navigation should come from BFCache");
+      }, () => {
+        ok(false, "The promises should not be rejected.");
+      });
+      outerBC.postMessage("navigate");
+      await check;
+
+      check = waitForPageShow(outerBC, innerBC).then(([first, second]) => {
+        is(first.name, "bug1740516_1_inner", "Should get pageShow from inner iframe page first.");
+        ok(!first.persisted, "Third navigation should not come from BFCache");
+        is(second.name, "bug1740516_1", "Should get pageShow from outer page second.");
+        ok(!second.persisted, "Third navigation should not come from BFCache");
+      }, () => {
+        ok(false, "The promises should not be rejected.");
+      });
+      outerBC.postMessage("block_bfcache_and_navigate");
+      await check;
+
+      outerBC.postMessage("close");
+
+      outerBC.close();
+      innerBC.close();
+
+      SimpleTest.finish();
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1741132.html b/docshell/test/mochitest/test_bug1741132.html
new file mode 100644
index 0000000000..1ae9727d9c
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1741132.html
@@ -0,0 +1,79 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test form restoration for no-store pages</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    // The number of entries which we keep in the BFCache (see nsSHistory.h).
+    const VIEWER_WINDOW = 3;
+
+    SimpleTest.waitForExplicitFinish();
+
+    function runTest() {
+      let bc = new BroadcastChannel("bug1741132");
+
+      // Setting the pref to 0 should evict all content viewers.
+      let load = SpecialPowers.pushPrefEnv({
+        set: [["browser.sessionhistory.max_total_viewers", 0]],
+      }).then(() => {
+        // Set the pref to VIEWER_WINDOW + 2 now, to be sure we
+        // could fit all entries.
+        SpecialPowers.pushPrefEnv({
+          set: [["browser.sessionhistory.max_total_viewers", VIEWER_WINDOW + 2]],
+        });
+      }).then(() => {
+        return new Promise(resolve => {
+          bc.addEventListener("message", resolve, { once: true });
+          window.open("file_bug1741132.html", "", "noopener");
+        });
+      });
+      // We want to try to keep one entry too many in the BFCache,
+      // so we ensure that there's at least VIEWER_WINDOW + 2
+      // entries in session history (with one for the displayed
+      // page).
+      for (let i = 0; i < VIEWER_WINDOW + 2; ++i) {
+        load = load.then(() => {
+          return new Promise((resolve) => {
+            bc.addEventListener("message", resolve, { once: true });
+            bc.postMessage({ cmd: "load", arg: `file_bug1741132.html?${i}` });
+          });
+        });
+      }
+      load.then(() => {
+        return new Promise((resolve) => {
+          bc.addEventListener("message", ({ data: persisted }) => {
+            resolve(persisted);
+          }, { once: true });
+          // Go back past the first entry that should be in the BFCache.
+          bc.postMessage({ cmd: "go", arg: -(VIEWER_WINDOW + 1) });
+        });
+      }).then((persisted) => {
+        ok(!persisted, "Only 3 pages should be kept in the BFCache");
+      }).then(() => {
+        return new Promise((resolve) => {
+          bc.addEventListener("message", ({ data: persisted }) => {
+            resolve(persisted);
+          }, { once: true });
+          // Go forward to the first entry that should be in the BFCache.
+          bc.postMessage({ cmd: "go", arg: 1 });
+        });
+      }).then((persisted) => {
+        ok(persisted, "3 pages should be kept in the BFCache");
+
+        bc.postMessage("close");
+
+        bc.close();
+
+        SimpleTest.finish();
+      });
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1742865.html b/docshell/test/mochitest/test_bug1742865.html
new file mode 100644
index 0000000000..c8f9a4eca3
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1742865.html
@@ -0,0 +1,137 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Auto refreshing pages shouldn't add an entry to session history</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    const REFRESH_REDIRECT_TIMER = 15;
+
+    // 2 tests (same and cross origin) consisting of 2 refreshes of maximum 1 seconds
+    // 2 tests (same and cross origin) consisting of 2 refreshes of REFRESH_REDIRECT_TIMER seconds
+    // => We need (2 * 1) + (2 * 15) seconds
+    SimpleTest.requestLongerTimeout(3);
+    SimpleTest.waitForExplicitFinish();
+
+    const SJS = new URL("file_bug1742865.sjs", location.href);
+    const SJS_OUTER = new URL("file_bug1742865_outer.sjs", location.href);
+    const SCROLL = 500;
+
+    let tolerance;
+    function setup() {
+      return SpecialPowers.spawn(window.top, [], () => {
+        return SpecialPowers.getDOMWindowUtils(content.window).getResolution();
+      }).then(resolution => {
+        // Allow a half pixel difference if the top document's resolution is lower
+        // than 1.0 because the scroll position is aligned with screen pixels
+        // instead of CSS pixels.
+        tolerance = resolution < 1.0 ? 0.5 : 0.0;
+      });
+    }
+
+    function checkScrollPosition(scrollPosition, shouldKeepScrollPosition) {
+      isfuzzy(scrollPosition, shouldKeepScrollPosition ? SCROLL : 0, tolerance,
+              `Scroll position ${shouldKeepScrollPosition ? "should" : "shouldn't"} be maintained for meta refresh`);
+    }
+
+    function openWindowAndCheckRefresh(url, params, shouldAddToHistory, shouldKeepScrollPosition) {
+      info(`Running test for ${JSON.stringify(params)}`);
+
+      url = new URL(url);
+      Object.entries(params).forEach(([k, v]) => { url.searchParams.append(k, v) });
+      url.searchParams.append("scrollTo", SCROLL);
+
+      let resetURL = new URL(SJS);
+      resetURL.search = "?reset";
+      return fetch(resetURL).then(() => {
+        return new Promise((resolve) => {
+          let count = 0;
+          window.addEventListener("message", function listener({ data: { commandType, commandData = {} } }) {
+            if (commandType == "onChangedInputValue") {
+              let { historyLength, inputValue } = commandData;
+
+              if (shouldAddToHistory) {
+                is(historyLength, count, "Auto-refresh should add entries to session history");
+              } else {
+                is(historyLength, 1, "Auto-refresh shouldn't add entries to session history");
+              }
+
+              is(inputValue, "1234", "Input's value should have been changed");
+
+              win.postMessage("loadNext", "*");
+              return;
+            }
+
+            is(commandType, "pageShow", "Unknown command type");
+
+            let { inputValue, scrollPosition } = commandData;
+
+            switch (++count) {
+              // file_bug1742865.sjs causes 3 loads:
+              //  * first load, returns first meta refresh
+              //  * second load, caused by first meta refresh, returns second meta refresh
+              //  * third load, caused by second meta refresh, doesn't return a meta refresh
+              case 2:
+                checkScrollPosition(scrollPosition, shouldKeepScrollPosition);
+                break;
+              case 3:
+                checkScrollPosition(scrollPosition, shouldKeepScrollPosition);
+                win.postMessage("changeInputValue", "*");
+                break;
+              case 4:
+                win.postMessage("back", "*");
+                break;
+              case 5:
+                is(inputValue, "1234", "Entries for auto-refresh should be attached to session history");
+                checkScrollPosition(scrollPosition, shouldKeepScrollPosition);
+                removeEventListener("message", listener);
+                win.close();
+                resolve();
+                break;
+            }
+          });
+          let win = window.open(url);
+        });
+      });
+    }
+
+    function doTest(seconds, crossOrigin, shouldAddToHistory, shouldKeepScrollPosition) {
+      let params = {
+        seconds,
+        crossOrigin,
+      };
+
+      return openWindowAndCheckRefresh(SJS, params, shouldAddToHistory, shouldKeepScrollPosition).then(() =>
+        openWindowAndCheckRefresh(SJS_OUTER, params, shouldAddToHistory, shouldKeepScrollPosition)
+      );
+    }
+
+    async function runTest() {
+      const FAST = Math.min(1, REFRESH_REDIRECT_TIMER);
+      const SLOW = REFRESH_REDIRECT_TIMER + 1;
+      let tests = [
+        // [ time, crossOrigin, shouldAddToHistory, shouldKeepScrollPosition ]
+        [ FAST, false, false, true ],
+        [ FAST, true, false, false ],
+        [ SLOW, false, false, true ],
+        [ SLOW, true, true, false ],
+      ];
+
+      await setup();
+
+      for (let [ time, crossOrigin, shouldAddToHistory, shouldKeepScrollPosition ] of tests) {
+        await doTest(time, crossOrigin, shouldAddToHistory, shouldKeepScrollPosition);
+      }
+
+      SimpleTest.finish();
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1743353.html b/docshell/test/mochitest/test_bug1743353.html
new file mode 100644
index 0000000000..a5d88df3f6
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1743353.html
@@ -0,0 +1,57 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test back/forward after pushState</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    function runTest() {
+      let bc = new BroadcastChannel("bug1743353");
+      new Promise((resolve) => {
+        bc.addEventListener("message", () => {
+          resolve();
+        }, { once: true });
+
+        window.open("file_bug1743353.html", "", "noopener");
+      }).then(() => {
+        return new Promise(resolve => {
+          bc.addEventListener("message", () => {
+            resolve();
+          }, { once: true });
+
+          bc.postMessage("load");
+        })
+      }).then(() => {
+        return new Promise(resolve => {
+          let results = [];
+          bc.addEventListener("message", function listener({ data }) {
+            results.push(data);
+            if (results.length == 3) {
+              bc.removeEventListener("message", listener);
+              resolve(results);
+            }
+          });
+
+          bc.postMessage("back");
+        });
+      }).then((results) => {
+        is(results[0], "pagehide", "First event should be 'pagehide'.");
+        is(results[1], "unload", "Second event should be 'unload'.");
+        is(results[2], "pageshow", "Third event should be 'pageshow'.");
+
+        bc.postMessage("close");
+
+        SimpleTest.finish();
+      });
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1747033.html b/docshell/test/mochitest/test_bug1747033.html
new file mode 100644
index 0000000000..539b78fec0
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1747033.html
@@ -0,0 +1,97 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test history after loading multipart</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    function runTest() {
+      let bc = new BroadcastChannel("bug1747033");
+      new Promise(resolve => {
+        bc.addEventListener("message", ({ data: { historyLength } }) => {
+          is(historyLength, 1, "Correct length for first normal load.");
+
+          resolve();
+        }, { once: true });
+
+        window.open("file_bug1747033.sjs", "", "noopener");
+      }).then(() => {
+        return new Promise(resolve => {
+          let loaded = 0;
+          bc.addEventListener("message", function listener({ data: { historyLength } }) {
+            ++loaded;
+
+            is(historyLength, 2, `Correct length for multipart load ${loaded}.`);
+
+            // We want 3 parts in total.
+            if (loaded < 3) {
+              if (loaded == 2) {
+                // We've had 2 parts, make the server send the last part.
+                fetch("file_bug1747033.sjs?sendLastPart");
+              } else {
+                fetch("file_bug1747033.sjs?sendNextPart");
+              }
+              return;
+            }
+
+            bc.removeEventListener("message", listener);
+            resolve();
+          });
+
+          bc.postMessage({ cmd: "load", arg: "file_bug1747033.sjs?multipart" });
+        });
+      }).then(() => {
+        return new Promise(resolve => {
+          bc.addEventListener("message", ({ data: { historyLength } }) => {
+            is(historyLength, 2, "Correct length after calling replaceState in multipart.");
+
+            resolve();
+          }, { once: true });
+
+          bc.postMessage({ cmd: "replaceState", arg: "file_bug1747033.sjs?replaced" });
+        });
+      }).then(() => {
+        return new Promise(resolve => {
+          bc.addEventListener("message", ({ data: { historyLength } }) => {
+            is(historyLength, 3, "Correct length for first normal load after multipart.");
+
+            resolve();
+          }, { once: true });
+
+          bc.postMessage({ cmd: "load", arg: "file_bug1747033.sjs" });
+        });
+      }).then(() => {
+        return new Promise(resolve => {
+          let goneBack = 0;
+          bc.addEventListener("message", function listener({ data: { historyLength } }) {
+            ++goneBack;
+
+            is(historyLength, 3, "Correct length after going back.");
+
+            if (goneBack == 1) {
+              bc.postMessage({ cmd: "back" });
+            } else if (goneBack == 2) {
+              bc.removeEventListener("message", listener);
+              resolve();
+            }
+          });
+
+          bc.postMessage({ cmd: "back" });
+        });
+      }).then(() => {
+        bc.postMessage({ cmd: "close" });
+
+        SimpleTest.finish();
+      });
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug1773192.html b/docshell/test/mochitest/test_bug1773192.html
new file mode 100644
index 0000000000..d4c42dc1a7
--- /dev/null
+++ b/docshell/test/mochitest/test_bug1773192.html
@@ -0,0 +1,61 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test referrer with going back</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    // file_bug1773192_1.html will send a message with some data on pageshow.
+    function waitForData(bc) {
+      return new Promise(resolve => {
+        bc.addEventListener(
+          "message",
+          ({ data }) => {
+            resolve(data);
+          },
+          { once: true }
+        );
+      });
+    }
+    async function runTest() {
+      let bc = new BroadcastChannel("bug1743353");
+
+      let getData = waitForData(bc);
+
+      window.open("file_bug1773192_1.html", "", "noreferrer");
+
+      await getData.then(({ referrer }) => {
+        is(referrer, "", "Referrer should be empty at first.");
+      });
+
+      getData = waitForData(bc);
+
+      // When file_bug1773192_1.html receives this message it will navigate to
+      // file_bug1773192_2.html. file_bug1773192_2.html removes itself from
+      // history with replaceState and submits a form with the POST method to
+      // file_bug1773192_3.sjs. file_bug1773192_3.sjs goes back in history.
+      // We should end up back at file_bug1773192_1.html, which will send a
+      // message with some data on pageshow.
+      bc.postMessage("next");
+
+      await getData.then(({ location, referrer }) => {
+        let firstURL = new URL("file_bug1773192_1.html", location).toString();
+        is(location, firstURL, "Location should be the first page again.");
+        is(referrer, firstURL, "Referrer should also be the first page.");
+      });
+
+      bc.postMessage("close");
+
+      SimpleTest.finish();
+    }
+  </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug385434.html b/docshell/test/mochitest/test_bug385434.html
new file mode 100644
index 0000000000..bc82de9daf
--- /dev/null
+++ b/docshell/test/mochitest/test_bug385434.html
@@ -0,0 +1,211 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=385434
+-->
+<head>
+  <title>Test for Bug 385434</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=385434">Mozilla Bug 385434</a>
+<p id="display"></p>
+<div id="content">
+  <iframe id="frame" style="height:100px; width:100px; border:0"></iframe>
+  <div id="status" style="display: none"></div>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 385434 */
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+SimpleTest.expectAssertions(0, 1); // bug 1333702
+
+var gNumHashchanges = 0;
+var gCallbackOnIframeLoad = false;
+var gSampleEvent;
+
+function statusMsg(msg) {
+  var msgElem = document.createElement("p");
+  msgElem.appendChild(document.createTextNode(msg));
+
+  document.getElementById("status").appendChild(msgElem);
+}
+
+function longWait() {
+  setTimeout(function() { gGen.next(); }, 1000);
+}
+
+// onIframeHashchange, onIframeLoad, and onIframeScroll are all called by the
+// content we load into our iframe in order to notify the parent frame of an
+// event which was fired.
+function onIframeHashchange() {
+  gNumHashchanges++;
+  gGen.next();
+}
+
+function onIframeLoad() {
+  if (gCallbackOnIframeLoad) {
+    gCallbackOnIframeLoad = false;
+    gGen.next();
+  }
+}
+
+function onIframeScroll() {
+  is(gNumHashchanges, 0, "onscroll should fire before onhashchange.");
+}
+
+function enableIframeLoadCallback() {
+  gCallbackOnIframeLoad = true;
+}
+
+function noEventExpected(msg) {
+  is(gNumHashchanges, 0, msg);
+
+  // Even if there's an error, set gNumHashchanges to 0 so other tests don't
+  // fail.
+  gNumHashchanges = 0;
+}
+
+function eventExpected(msg) {
+  is(gNumHashchanges, 1, msg);
+
+  // Eat up this event, whether the test above was true or not
+  gNumHashchanges = 0;
+}
+
+/*
+ * The hashchange event is dispatched asynchronously, so if we want to observe
+ * it, we have to yield within run_test(), transferring control back to the
+ * event loop.
+ *
+ * When we're expecting our iframe to observe a hashchange event after we poke
+ * it, we just yield and wait for onIframeHashchange() to call gGen.next() and
+ * wake us up.
+ *
+ * When we're testing to ensure that the iframe doesn't dispatch a hashchange
+ * event, we try to hook onto the iframe's load event.  We call
+ * enableIframeLoadCallback(), which causes onIframeLoad() to call gGen.next()
+ * upon the next observed load.  After we get our callback, we check that a
+ * hashchange didn't occur.
+ *
+ * We can't always just wait for page load in order to observe that a
+ * hashchange didn't happen.  In these cases, we call longWait() and yield
+ * until either a hashchange occurs or longWait's callback is scheduled.  This
+ * is something of a hack; it's entirely possible that longWait won't wait long
+ * enough, and we won't observe what should have been a failure of the test.
+ * But it shouldn't happen that good code will randomly *fail* this test.
+ */
+function* run_test() {
+  /*
+   * TEST 1 tests that:
+   *    <body onhashchange = ... >  works,
+   *    the event is (not) fired at the correct times
+   */
+  var frame = document.getElementById("frame");
+  var frameCw = frame.contentWindow;
+
+  enableIframeLoadCallback();
+  frameCw.document.location = "file_bug385434_1.html";
+  // Wait for the iframe to load and for our callback to fire
+  yield undefined;
+
+  noEventExpected("No hashchange expected initially.");
+
+  sendMouseEvent({type: "click"}, "link1", frameCw);
+  yield undefined;
+  eventExpected("Clicking link1 should trigger a hashchange.");
+
+  sendMouseEvent({type: "click"}, "link1", frameCw);
+  longWait();
+  yield undefined;
+  // succeed if a hashchange event wasn't triggered while we were waiting
+  noEventExpected("Clicking link1 again should not trigger a hashchange.");
+
+  sendMouseEvent({type: "click"}, "link2", frameCw);
+  yield undefined;
+  eventExpected("Clicking link2 should trigger a hashchange.");
+
+  frameCw.history.go(-1);
+  yield undefined;
+  eventExpected("Going back should trigger a hashchange.");
+
+  frameCw.history.go(1);
+  yield undefined;
+  eventExpected("Going forward should trigger a hashchange.");
+
+  // window.location has a trailing '#' right now, so we append "link1", not
+  // "#link1".
+  frameCw.window.location = frameCw.window.location + "link1";
+  yield undefined;
+  eventExpected("Assigning to window.location should trigger a hashchange.");
+
+  // Set up history in the iframe which looks like:
+  //   file_bug385434_1.html#link1
+  //   file_bug385434_2.html
+  //   file_bug385434_1.html#foo      <-- current page
+  enableIframeLoadCallback();
+  frameCw.window.location = "file_bug385434_2.html";
+  yield undefined;
+
+  enableIframeLoadCallback();
+  frameCw.window.location = "file_bug385434_1.html#foo";
+  yield undefined;
+
+  // Now when we do history.go(-2) on the frame, it *shouldn't* fire a
+  // hashchange.  Although the URIs differ only by their hashes, they belong to
+  // two different Documents.
+  frameCw.history.go(-2);
+  longWait();
+  yield undefined;
+  noEventExpected("Moving between different Documents shouldn't " +
+                  "trigger a hashchange.");
+
+  /*
+   * TEST 2 tests that:
+   *     <frameset onhashchange = ... > works,
+   *     the event is targeted at the window object
+   *     the event's cancelable, bubbles settings are correct
+   */
+
+  enableIframeLoadCallback();
+  frameCw.document.location = "file_bug385434_2.html";
+  yield undefined;
+
+  frameCw.document.location = "file_bug385434_2.html#foo";
+  yield undefined;
+
+  eventExpected("frame onhashchange should fire events.");
+  // iframe should set gSampleEvent
+  is(gSampleEvent.target, frameCw,
+     "The hashchange event should be targeted to the window.");
+  is(gSampleEvent.type, "hashchange",
+     "Event type should be 'hashchange'.");
+  is(gSampleEvent.cancelable, false,
+     "The hashchange event shouldn't be cancelable.");
+  is(gSampleEvent.bubbles, false,
+     "The hashchange event should not bubble.");
+
+  /*
+   * TEST 3 tests that:
+   *     hashchange is dispatched if the current document readyState is
+   *     not "complete" (bug 504837).
+   */
+  frameCw.document.location = "file_bug385434_3.html";
+  yield undefined;
+  eventExpected("Hashchange should fire even if the document " +
+                "hasn't finished loading.");
+
+  SimpleTest.finish();
+}
+
+var gGen = run_test();
+gGen.next();
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug387979.html b/docshell/test/mochitest/test_bug387979.html
new file mode 100644
index 0000000000..0aca2ee89b
--- /dev/null
+++ b/docshell/test/mochitest/test_bug387979.html
@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=387979
+-->
+<head>
+  <title>Test for Bug 387979</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=387979">Mozilla Bug 387979</a>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 387979 */
+function a(s) {
+  var r;
+  try { r = frames[0].document.body; } catch (e) { r = e; }
+  is(r instanceof frames[0].HTMLBodyElement, true, "Can't get body" + s);
+}
+var p = 0;
+function b() {
+  switch (++p) {
+    case 1:
+      frames[0].location = "about:blank";
+    break;
+    case 2:
+      a("before reload");
+      frames[0].location.reload();
+    break;
+    case 3:
+      a("after reload");
+      SimpleTest.finish();
+    break;
+  }
+}
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</pre>
+<p id="display">
+  <iframe onload="b()"></iframe>
+  <pre id="p">-</pre>
+</p>
+</body>
+</html>
+
diff --git a/docshell/test/mochitest/test_bug402210.html b/docshell/test/mochitest/test_bug402210.html
new file mode 100644
index 0000000000..326f98cf9f
--- /dev/null
+++ b/docshell/test/mochitest/test_bug402210.html
@@ -0,0 +1,50 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+While working on bug 402210, it came up that the code was doing
+
+a.href = proto + host
+
+which technically produces "https:host" instead of "https://host" and
+that the code was relying on href's setting having fixup behaviour
+for this kind of thing.
+
+If we rely on it, we might as well test for it, even if it isn't the
+problem 402210 was meant to fix.
+
+https://bugzilla.mozilla.org/show_bug.cgi?id=402210
+-->
+<head>
+  <title>Test for Bug 402210</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=402210">Mozilla Bug 402210</a>
+<p id="display">
+  <a id="testlink">Test Link</a>
+</p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+function runTest() {
+  $("testlink").href = "https:example.com";
+  is($("testlink").href, "https://example.com/", "Setting href on an anchor tag should fixup missing slashes after https protocol");
+
+  $("testlink").href = "ftp:example.com";
+  is($("testlink").href, "ftp://example.com/", "Setting href on an anchor tag should fixup missing slashes after non-http protocol");
+
+  SimpleTest.finish();
+}
+
+addLoadEvent(runTest);
+</script>
+</pre>
+</body>
+</html>
+
diff --git a/docshell/test/mochitest/test_bug404548.html b/docshell/test/mochitest/test_bug404548.html
new file mode 100644
index 0000000000..a8a773dce5
--- /dev/null
+++ b/docshell/test/mochitest/test_bug404548.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=404548
+-->
+<head>
+  <title>Test for Bug 404548</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=404548">Mozilla Bug 404548</a>
+<p id="display">
+</p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 404548 */
+var firstRemoved = false;
+var secondHidden = false;
+
+SimpleTest.waitForExplicitFinish();
+
+var w = window.open("bug404548-subframe.html", "", "width=10,height=10");
+
+function finishTest() {
+  is(firstRemoved, true, "Should have removed iframe from the DOM");
+  is(secondHidden, true, "Should have fired pagehide on second kid");
+  w.close();
+  SimpleTest.finish();
+}
+</script>
+</pre>
+</body>
+</html>
+
diff --git a/docshell/test/mochitest/test_bug413310.html b/docshell/test/mochitest/test_bug413310.html
new file mode 100644
index 0000000000..4299605575
--- /dev/null
+++ b/docshell/test/mochitest/test_bug413310.html
@@ -0,0 +1,106 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=413310
+-->
+<head>
+  <title>Test for Bug 413310</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=413310">Mozilla Bug 413310</a>
+<p id="display">
+<script class="testbody" type="text/javascript">
+
+if (navigator.platform.startsWith("Mac")) {
+  SimpleTest.expectAssertions(0, 2);
+} else {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+/** Test for Bug 413310 */
+
+// NOTE: If we ever make subframes do bfcache stuff, this test will need to be
+// modified accordingly!  It assumes that subframes do NOT get bfcached.
+var onloadCount = 0;
+
+var step = -1; // One increment will come from the initial subframe onload.
+               // Note that this script should come before the subframe,
+               // so that doNextStep is defined when its onload handler fires.
+
+var textContent;
+
+SimpleTest.waitForExplicitFinish();
+
+addLoadEvent(doNextStep);
+
+function doNextStep() {
+  ++step;
+  switch (step) {
+    case 1:
+      is(onloadCount, 1, "Loaded initial page");
+      is($("i").contentWindow.location.href,
+         location.href.replace(/test_bug413310.html/,
+                               "bug413310-subframe.html"),
+         "Unexpected subframe location after initial load");
+      $("i").contentDocument.forms[0].submit();
+      break;
+    case 2:
+      is(onloadCount, 2, "Loaded POST result");
+
+      is($("i").contentWindow.location.href,
+         location.href.replace(/test_bug413310.html/,
+                               "bug413310-post.sjs"),
+         "Unexpected subframe location after POST load");
+
+      textContent = $("i").contentDocument.body.textContent;
+      isDeeply(textContent.match(/^POST /), ["POST "], "Not a POST?");
+
+      $("i").contentWindow.location.hash = "foo";
+      setTimeout(doNextStep, 0);
+      break;
+    case 3:
+      is(onloadCount, 2, "Anchor scroll should not fire onload");
+      is($("i").contentWindow.location.href,
+         location.href.replace(/test_bug413310.html/,
+                               "bug413310-post.sjs#foo"),
+         "Unexpected subframe location after anchor scroll");
+      is(textContent, $("i").contentDocument.body.textContent,
+         "Did a load when scrolling?");
+      $("i").contentWindow.location.href = "bug413310-subframe.html";
+      break;
+    case 4:
+      is(onloadCount, 3, "Done new load");
+      is($("i").contentWindow.location.href,
+         location.href.replace(/test_bug413310.html/,
+                               "bug413310-subframe.html"),
+         "Unexpected subframe location after new load");
+      history.back();
+      break;
+    case 5:
+      is(onloadCount, 4,
+         "History traversal didn't fire onload: bfcache issues!");
+      is($("i").contentWindow.location.href,
+         location.href.replace(/test_bug413310.html/,
+                               "bug413310-post.sjs#foo"),
+         "Unexpected subframe location");
+      is(textContent, $("i").contentDocument.body.textContent,
+         "Did a load when going back?");
+      SimpleTest.finish();
+      break;
+  }
+}
+</script>
+<!-- Use a timeout in onload so that we don't do a load immediately inside onload -->
+<iframe id="i" src="bug413310-subframe.html" onload="setTimeout(doNextStep, 20)">
+</iframe>
+</p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
+
diff --git a/docshell/test/mochitest/test_bug475636.html b/docshell/test/mochitest/test_bug475636.html
new file mode 100644
index 0000000000..fb1827ad04
--- /dev/null
+++ b/docshell/test/mochitest/test_bug475636.html
@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=475636
+Test that refresh to data: URIs don't inherit the principal
+-->
+<head>
+  <title>Test for Bug 475636</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body onload="gen.next()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=475636">Mozilla Bug 475636</a>
+
+<div id="content" style="display: none">
+  
+</div>
+<iframe id=loader></iframe>
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var gen = runTests();
+
+window.private = 42;
+
+window.addEventListener("message", function(e) {
+  gen.next(e.data);
+});
+
+var url = "file_bug475636.sjs?";
+
+function* runTests() {
+  var loader = document.getElementById("loader");
+  for (var testNum = 1; ; ++testNum) {
+    loader.src = url + testNum;
+    let res = (yield);
+    if (res == "done") {
+      SimpleTest.finish();
+      return;
+    }
+    is(res, "pass");
+  }
+}
+
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug509055.html b/docshell/test/mochitest/test_bug509055.html
new file mode 100644
index 0000000000..57ede19b43
--- /dev/null
+++ b/docshell/test/mochitest/test_bug509055.html
@@ -0,0 +1,115 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=509055
+-->
+<head>
+  <title>Test for Bug 509055</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=509055">Mozilla Bug 509055</a>
+<p id="display"></p>
+<div id="status"></div>
+<div id="content">
+</div>
+<pre id="test">
+  <script type="application/javascript">
+
+    /** Test for Bug 509055 */
+
+    SimpleTest.waitForExplicitFinish();
+
+    var gGen;
+
+    function shortWait() {
+      setTimeout(function() { gGen.next(); }, 0, false);
+    }
+
+    function onChildHashchange(e) {
+      // gGen might be undefined when we refresh the page, so we have to check here
+      dump("onChildHashchange() called.\n");
+      if (gGen)
+        gGen.next();
+    }
+
+    function onChildLoad(e) {
+      if (gGen)
+        gGen.next();
+    }
+
+    async function* runTest() {
+      var popup = window.open("file_bug509055.html", "popup 0",
+                              "height=200,width=200,location=yes," +
+                              "menubar=yes,status=yes,toolbar=yes,dependent=yes");
+      popup.hashchangeCallback = onChildHashchange;
+      popup.onload = onChildLoad;
+      dump("Waiting for initial load.\n");
+      yield undefined;
+
+      // Without this wait, the change to location.hash below doesn't create a
+      // SHEntry or enable the back button.
+      shortWait();
+      dump("Got initial load.  Spinning event loop.\n");
+      yield undefined;
+
+      popup.location.hash = "#1";
+      dump("Waiting for hashchange.\n");
+      yield undefined;
+
+      popup.history.back();
+      dump("Waiting for second hashchange.\n");
+      yield undefined; // wait for hashchange
+
+      popup.document.title = "Changed";
+
+      // Wait for listeners to be notified of the title change.
+      shortWait();
+      dump("Got second hashchange.  Spinning event loop.\n");
+      yield undefined;
+
+      let sheTitle = "";
+      if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+        var sh = SpecialPowers.wrap(popup)
+                              .docShell
+                              .QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
+                              .sessionHistory;
+
+        // Get the title of the inner popup's current SHEntry
+        sheTitle = sh.legacySHistory.getEntryAtIndex(sh.index).title;
+      } else {
+        let chromeScript = SpecialPowers.loadChromeScript(() => {
+          /* eslint-env mozilla/chrome-script */
+          addMessageListener("getTitle", browsingContext => {
+            // eslint-disable-next-line no-shadow
+            let sh = browsingContext.sessionHistory;
+            let title = sh.getEntryAtIndex(sh.index).title;
+            sendAsyncMessage("title", title);
+          });
+        });
+
+        let p = chromeScript.promiseOneMessage("title");
+        let browsingContext = SpecialPowers.wrap(popup)
+                                           .docShell.browsingContext;
+        chromeScript.sendAsyncMessage("getTitle", browsingContext);
+        sheTitle = await p;
+        chromeScript.destroy();
+      }
+      is(sheTitle, "Changed", "SHEntry's title should change when we change.");
+
+      popup.close();
+
+      SimpleTest.executeSoon(SimpleTest.finish);
+    }
+
+    window.addEventListener("load", function() {
+      gGen = runTest();
+      gGen.next();
+    });
+
+  </script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug511449.html b/docshell/test/mochitest/test_bug511449.html
new file mode 100644
index 0000000000..da95909d1c
--- /dev/null
+++ b/docshell/test/mochitest/test_bug511449.html
@@ -0,0 +1,56 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=511449
+-->
+<head>
+  <title>Test for Bug 511449</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <script src="/tests/SimpleTest/NativeKeyCodes.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=511449">Mozilla Bug 511449</a>
+<p id="display"></p>
+<div id="status"></div>
+<div id="content">
+</div>
+<input type="text" id="input">
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 511449 */
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+window.addEventListener("load", runTest);
+
+var win = null;
+
+function runTest() {
+  document.getElementById("input").focus();
+  win = window.open("file_bug511449.html", "");
+  SimpleTest.waitForFocus(runNextTest, win);
+}
+
+function runNextTest() {
+  var didClose = false;
+  win.onunload = function() {
+    didClose = true;
+  };
+  synthesizeNativeKey(KEYBOARD_LAYOUT_EN_US, MAC_VK_ANSI_W, {metaKey: 1}, "w", "w");
+
+  setTimeout(function() {
+    ok(didClose, "Cmd+W should have closed the tab");
+    if (!didClose) {
+      win.close();
+    }
+    SimpleTest.finish();
+  }, 1000);
+}
+
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug529119-1.html b/docshell/test/mochitest/test_bug529119-1.html
new file mode 100644
index 0000000000..1c89780fc7
--- /dev/null
+++ b/docshell/test/mochitest/test_bug529119-1.html
@@ -0,0 +1,110 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<title>Test bug 529119</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+
+var workingURL = "http://mochi.test:8888/tests/docshell/test/mochitest/bug529119-window.html";
+var faultyURL = "https://www.some-nonexistent-domain-27489274c892748217cn2384.test/";
+
+var w = null;
+var phase = 0;
+var gotWrongPageOnTryAgainClick = false;
+// Token that represents which page we currently have loaded.
+var token = 0;
+
+function delay(msec) {
+  return new Promise(resolve => setTimeout(resolve, msec));
+}
+
+async function assignToken(tokenToAssign) {
+  await SpecialPowers.spawn(w, [tokenToAssign],
+                            newToken => { this.content.token = newToken });
+}
+
+async function pollForPage(win) {
+  while (true) {
+    try {
+      // When we do our navigation, there may be an interstitial about:blank
+      // page if the navigation involves a process switch.  That about:blank
+      // will exist between the new process's docshell being created and the
+      // actual page that's being loaded loading (which can happen async from
+      // the docshell creation).  We want to avoid treating the initial
+      // about:blank as a new page.
+      //
+      // We could conceivably expose Document::IsInitialDocument() as a
+      // ChromeOnly thing and use it here, but let's just filter out all
+      // about:blank, since we don't expect any in this test.
+      var haveNewPage = await SpecialPowers.spawn(w, [token],
+        currentToken => this.content.token != currentToken &&
+                        this.content.location.href != "about:blank");
+
+      if (haveNewPage) {
+        ++token;
+        assignToken(token);
+        break;
+      }
+    } catch (e) {
+      // Something went wrong; just keep waiting.
+    }
+
+    await delay(100);
+  }
+}
+
+async function windowLoaded() {
+  switch (phase) {
+    case 0:
+      assignToken(token);
+
+      /* 2. We have succeededfully loaded a page, now go to a faulty URL */
+      window.setTimeout(function() {
+        w.location.href = faultyURL;
+      }, 0);
+
+      phase = 1;
+
+      await pollForPage(w);
+      is(await SpecialPowers.spawn(w, [], () => this.content.location.href),
+         faultyURL,
+         "Is on an error page initially");
+
+      /* 3. now, while we are on the error page, try to reload it, actually
+         click the "Try Again" button */
+      SpecialPowers.spawn(w, [], () => this.content.location.reload());
+
+      await pollForPage(w);
+
+      /* 4-finish, check we are still on the error page */
+      is(await SpecialPowers.spawn(w, [], () => this.content.location.href),
+         faultyURL,
+         "Is on an error page");
+      is(gotWrongPageOnTryAgainClick, false,
+        "Must not get www.example.com page on reload of an error page");
+      w.close();
+      SimpleTest.finish();
+      break;
+
+    case 1:
+      /* 4-check, we must not get here! */
+      gotWrongPageOnTryAgainClick = true;
+      break;
+  }
+}
+
+function startTest() {
+  /* 1. load a URL that leads to an error page */
+  w = window.open(workingURL);
+}
+
+</script>
+</head>
+<body onload="startTest();">
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug529119-2.html b/docshell/test/mochitest/test_bug529119-2.html
new file mode 100644
index 0000000000..a8bd57d4f7
--- /dev/null
+++ b/docshell/test/mochitest/test_bug529119-2.html
@@ -0,0 +1,116 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<title>Test bug 529119</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+
+var workingURL = "http://mochi.test:8888/tests/docshell/test/mochitest/bug529119-window.html";
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var faultyURL = "http://some-nonexistent-domain-27489274c892748217cn2384.test/";
+
+var w = null;
+var phase = 0;
+var isWindowLoaded = false;
+// Token that represents which page we currently have loaded.
+var token = 0;
+
+function delay(msec) {
+  return new Promise(resolve => setTimeout(resolve, msec));
+}
+
+async function assignToken(tokenToAssign) {
+  await SpecialPowers.spawn(w, [tokenToAssign],
+                            newToken => { this.content.token = newToken });
+}
+
+// Returns when a new page is loaded and returns whether that page is an
+// error page.
+async function pollForPage(win) {
+  while (true) {
+    try {
+      // When we do our navigation, there may be an interstitial about:blank
+      // page if the navigation involves a process switch.  That about:blank
+      // will exist between the new process's docshell being created and the
+      // actual page that's being loaded loading (which can happen async from
+      // the docshell creation).  We want to avoid treating the initial
+      // about:blank as a new page.
+      //
+      // We could conceivably expose Document::IsInitialDocument() as a
+      // ChromeOnly thing and use it here, but let's just filter out all
+      // about:blank, since we don't expect any in this test.
+      var haveNewPage = await SpecialPowers.spawn(w, [token],
+        currentToken => this.content.token != currentToken &&
+                        this.content.location.href != "about:blank");
+
+      if (haveNewPage) {
+        ++token;
+        assignToken(token);
+
+        // In this test, error pages are non-same-origin with us, and non-error
+        // pages are same-origin.
+        let haveErrorPage = false;
+        try {
+          win.document.title;
+        } catch (ex) {
+          haveErrorPage = true;
+        }
+        return haveErrorPage;
+      }
+    } catch (e) {
+      // Something went wrong; just keep waiting.
+    }
+
+    await delay(100);
+  }
+}
+
+async function windowLoaded() {
+  // The code under here should only be run once
+  // The test popup window workingURL was already opened
+  if (isWindowLoaded)
+    return;
+  isWindowLoaded = true;
+
+  assignToken(token);
+
+  /* 2. We have successfully loaded a page, now go to a faulty URL */
+  // XXX The test fails when we change the location synchronously
+  window.setTimeout(function() {
+    w.location.href = faultyURL;
+  }, 0);
+
+  ok(await pollForPage(w), "Waiting for error page succeeded");
+  /* 3. now, while we are on the error page, navigate back */
+  try {
+    // We need the SpecialPowers bit, because this is a cross-origin window
+    // and we normally can't touch .history on those.
+    await SpecialPowers.spawn(w, [], () => this.content.history.back());
+  } catch (ex) {
+    ok(false, "w.history.back() threw " + ex);
+  }
+
+  ok(!await pollForPage(w), "Waiting for original page succeeded");
+  /* 4-finish, check we are back at the original page */
+  is(await SpecialPowers.spawn(w, [], () => this.content.location.href),
+     workingURL,
+     "Is on the previous page");
+  w.close();
+  SimpleTest.finish();
+}
+
+function startTest() {
+  /* 1. load a URL that leads to an error page */
+  w = window.open(workingURL);
+}
+
+</script>
+</head>
+<body onload="startTest();">
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug530396.html b/docshell/test/mochitest/test_bug530396.html
new file mode 100644
index 0000000000..fa3ddc6db6
--- /dev/null
+++ b/docshell/test/mochitest/test_bug530396.html
@@ -0,0 +1,56 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=530396
+-->
+<head>
+  <title>Test for Bug 530396</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=530396">Mozilla Bug 530396</a>
+
+<p>
+
+<iframe id="testFrame" src="http://mochi.test:8888/tests/docshell/test/mochitest/bug530396-subframe.html"></iframe>
+
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+// NOTE: If we ever make subframes do bfcache stuff, this test will need to be
+// modified accordingly!  It assumes that subframes do NOT get bfcached.
+var onloadCount = 0;
+
+var step = 0;
+
+var gTestFrame = document.getElementById("testFrame");
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+addLoadEvent(doNextStep);
+
+function doNextStep() {
+  ++step;
+  switch (step) {
+    case 1:
+      is(onloadCount, 1, "Loaded initial page");
+      sendMouseEvent({type: "click"}, "target2", gTestFrame.contentWindow);
+      window.setTimeout(doNextStep, 1000);
+      break;
+
+    case 2:
+      is(onloadCount, 1, "opener must be null");
+      sendMouseEvent({type: "click"}, "target1", gTestFrame.contentWindow);
+      break;
+
+    case 3:
+      is(onloadCount, 2, "don't send referrer with rel=referrer");
+      SimpleTest.finish();
+      break;
+  }
+}
+</script>
+</pre>
+</html>
diff --git a/docshell/test/mochitest/test_bug540462.html b/docshell/test/mochitest/test_bug540462.html
new file mode 100644
index 0000000000..e0a0861aaf
--- /dev/null
+++ b/docshell/test/mochitest/test_bug540462.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=540462
+-->
+<head>
+  <title>Test for Bug 540462</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=540462">Mozilla Bug 540462</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 540462 */
+
+var win;
+function runTest() {
+  win = window.open("file_bug540462.html", "", "width=100,height=100");
+}
+
+var dwlCount = 0;
+var originalURL;
+function documentWriteLoad() {
+  if (++dwlCount == 1) {
+    originalURL = win.document.body.firstChild.href;
+  } else if (dwlCount == 2) {
+    is(win.document.body.firstChild.href, originalURL, "Wrong href!");
+    win.close();
+    SimpleTest.finish();
+  }
+}
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug551225.html b/docshell/test/mochitest/test_bug551225.html
new file mode 100644
index 0000000000..b2862fcad8
--- /dev/null
+++ b/docshell/test/mochitest/test_bug551225.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=551225
+-->
+<head>
+  <title>Test for Bug 551225</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=551225">Mozilla Bug 551225</a>
+
+<script type="application/javascript">
+
+/** Test for Bug 551225 */
+
+var obj = {
+  a: new Date("1/1/2000"),
+  b: /^foo$/,
+  c: "bar",
+};
+
+history.replaceState(obj, "", "");
+is(history.state.a.toString(), new Date("1/1/2000").toString(), "Date object.");
+is(history.state.b.toString(), "/^foo$/", "Regex");
+is(history.state.c, "bar", "Other state");
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug570341.html b/docshell/test/mochitest/test_bug570341.html
new file mode 100644
index 0000000000..363f985407
--- /dev/null
+++ b/docshell/test/mochitest/test_bug570341.html
@@ -0,0 +1,142 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=570341
+-->
+<head>
+  <title>Test for Bug 570341</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+<script>
+  var start = Date.now();
+  var moments = {};
+
+  var unload = 0;
+  var wasEnabled = true;
+
+  function collectMoments() {
+    var win = frames[0];
+    var timing = (win.performance && win.performance.timing) || {};
+    for (let p in timing) {
+      moments[p] = timing[p];
+    }
+    for (let p in win) {
+      if (p.substring(0, 9) == "_testing_") {
+        moments[p.substring(9)] = win[p];
+      }
+    }
+    moments.evt_unload = unload;
+    return moments;
+  }
+
+  function showSequence(node) {
+    while (node.firstChild) {
+      node.firstChild.remove();
+    }
+    var sequence = [];
+    for (var p in moments) {
+      sequence.push(p);
+    }
+    sequence.sort(function(a, b) {
+      return moments[a] - moments[b];
+    });
+    var table = document.createElement("table");
+    node.appendChild(table);
+    var row = document.createElement("tr");
+    table.appendChild(row);
+    var cell = document.createElement("td");
+    row.appendChild(cell);
+    cell.appendChild(document.createTextNode("start"));
+    cell = document.createElement("td");
+    row.appendChild(cell);
+    cell.appendChild(document.createTextNode(start));
+    for (var i = 0; i < sequence.length; ++i) {
+      var prop = sequence[i];
+      row = document.createElement("tr");
+      table.appendChild(row);
+      cell = document.createElement("td");
+      row.appendChild(cell);
+      cell.appendChild(document.createTextNode(prop));
+      cell = document.createElement("td");
+      row.appendChild(cell);
+      cell.appendChild(document.createTextNode(moments[prop]));
+    }
+  }
+
+  function checkValues() {
+    var win = frames[0];
+    ok(win.performance,
+        "window.performance is missing or not accessible for frame");
+    ok(!win.performance || win.performance.timing,
+        "window.performance.timing is missing or not accessible for frame");
+    collectMoments();
+
+    var sequences = [
+      ["navigationStart", "unloadEventStart", "unloadEventEnd"],
+      ["navigationStart", "fetchStart", "domainLookupStart", "domainLookupEnd",
+       "connectStart", "connectEnd", "requestStart", "responseStart", "responseEnd"],
+      ["responseStart", "domLoading", "domInteractive", "domComplete"],
+      ["domContentLoadedEventStart", "domContentLoadedEventEnd",
+       "loadEventStart", "loadEventEnd"],
+    ];
+
+    for (var i = 0; i < sequences.length; ++i) {
+      var seq = sequences[i];
+      for (var j = 0; j < seq.length; ++j) {
+        var prop = seq[j];
+        if (j > 0) {
+          var prevProp = seq[j - 1];
+          ok(moments[prevProp] <= moments[prop],
+              ["Expected ", prevProp, " to happen before ", prop,
+              ", got ", prevProp, " = ", moments[prevProp],
+              ", ", prop, " = ", moments[prop]].join(""));
+        }
+      }
+    }
+
+    SimpleTest.finish();
+  }
+
+window.onload = function() {
+  var win = frames[0];
+  win.addEventListener("unload", function() {
+    unload = Date.now();
+  }, true);
+  var seenLoad = 0;
+  win.addEventListener("load", function() {
+    seenLoad = Date.now();
+  }, true);
+  frames[0].location = "bug570341_recordevents.html";
+  var interval = setInterval(function() {
+    // time constants here are arbitrary, chosen to allow the test to pass
+    var stopPolling = (win.performance && win.performance.loadEventEnd) ||
+                      (seenLoad && Date.now() >= seenLoad + 3000) ||
+                      Date.now() >= start + 30000;
+    if (stopPolling) {
+      clearInterval(interval);
+      checkValues();
+    } else if (win._testing_evt_load) {
+      seenLoad = Date.now();
+    }
+  }, 100);
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=570341">Mozilla Bug 570341</a>
+<div id="frames">
+<iframe name="child0" src="navigation/blank.html"></iframe>
+</div>
+<button type="button" onclick="showSequence(document.getElementById('display'))">
+    Show Events</button>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug580069.html b/docshell/test/mochitest/test_bug580069.html
new file mode 100644
index 0000000000..bb0a3bc823
--- /dev/null
+++ b/docshell/test/mochitest/test_bug580069.html
@@ -0,0 +1,58 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=580069
+-->
+<head>
+  <title>Test for Bug 580069</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=580069">Mozilla Bug 580069</a>
+
+<script type="application/javascript">
+
+add_task(async function() {
+  let iframe = document.createElement("iframe");
+  iframe.setAttribute("src", "file_bug580069_1.html");
+
+  // Insert the initial <iframe> document, and wait for page1Load to be called
+  // after it loads.
+  document.body.appendChild(iframe);
+  await new Promise(resolve => {
+    window.page1Load = resolve;
+  });
+  let iframeCw = iframe.contentWindow;
+
+  info("iframe's location is: " + iframeCw.location + "\n");
+
+  // Submit the forum and wait for the initial page load using a POST load.
+  iframeCw.document.getElementById("form").submit();
+  let method1 = await new Promise(resolve => {
+    window.page2Load = resolve;
+  });
+  info("iframe's location is: " + iframeCw.location + ", method is " + method1 + "\n");
+  is(method1, "POST", "Method for first load should be POST.");
+
+  // Push a new state, and refresh the page. This refresh shouldn't pop up the
+  // "are you sure you want to refresh a page with POST data?" dialog. If it
+  // does, this test will hang and fail, and we'll see 'Refreshing iframe...' at
+  // the end of the test log.
+  iframeCw.history.replaceState("", "", "?replaced");
+
+  info("Refreshing iframe...\n");
+  iframeCw.location.reload();
+  let method2 = await new Promise(resolve => {
+    window.page2Load = resolve;
+  });
+
+  info("iframe's location is: " + iframeCw.location + ", method is " + method2 + "\n");
+  is(method2, "GET", "Method for second load should be GET.");
+  is(iframeCw.location.search, "?replaced", "Wrong search on iframe after refresh.");
+});
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug590573.html b/docshell/test/mochitest/test_bug590573.html
new file mode 100644
index 0000000000..83554a7a66
--- /dev/null
+++ b/docshell/test/mochitest/test_bug590573.html
@@ -0,0 +1,198 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=590573
+-->
+<head>
+  <title>Test for Bug 590573</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=590573">Mozilla Bug 590573</a>
+
+<script type='application/javascript'>
+SimpleTest.waitForExplicitFinish();
+
+// Listen to the first callback, since this indicates that the page loaded.
+var page1LoadCallbackEnabled = true;
+function page1Load() {
+  if (page1LoadCallbackEnabled) {
+    page1LoadCallbackEnabled = false;
+    dump("Got page1 load.\n");
+    pageLoad();
+  } else {
+    dump("Ignoring page1 load.\n");
+  }
+}
+
+var page1PageShowCallbackEnabled = false;
+function page1PageShow() {
+  if (page1PageShowCallbackEnabled) {
+    page1PageShowCallbackEnabled = false;
+    dump("Got page1 pageshow.\n");
+    pageLoad();
+  } else {
+    dump("Ignoring page1 pageshow.\n");
+  }
+}
+
+var page2LoadCallbackEnabled = false;
+function page2Load() {
+  if (page2LoadCallbackEnabled) {
+    page2LoadCallbackEnabled = false;
+    dump("Got page2 popstate.\n");
+    pageLoad();
+  } else {
+    dump("Ignoring page2 popstate.\n");
+  }
+}
+
+var page2PopstateCallbackEnabled = false;
+function page2Popstate() {
+  if (page2PopstateCallbackEnabled) {
+    page2PopstateCallbackEnabled = false;
+    dump("Got page2 popstate.\n");
+    pageLoad();
+  } else {
+    dump("Ignoring page2 popstate.\n");
+  }
+}
+
+var page2PageShowCallbackEnabled = false;
+function page2PageShow() {
+  if (page2PageShowCallbackEnabled) {
+    page2PageShowCallbackEnabled = false;
+    dump("Got page2 pageshow.\n");
+    pageLoad();
+  } else {
+    dump("Ignoring page2 pageshow.\n");
+  }
+}
+
+var popup = window.open("file_bug590573_1.html");
+
+var gTestContinuation = null;
+var loads = 0;
+function pageLoad() {
+  loads++;
+  dump("pageLoad(loads=" + loads + ", page location=" + popup.location + ")\n");
+
+  if (!gTestContinuation) {
+    gTestContinuation = testBody();
+  }
+  var ret = gTestContinuation.next();
+  if (ret.done) {
+    SimpleTest.finish();
+  }
+}
+
+function continueAsync() {
+  popup.addEventListener("popstate", function() {
+      popup.requestAnimationFrame(function() { gTestContinuation.next(); });
+    },
+    {once: true});
+}
+
+function* testBody() {
+  is(popup.scrollY, 0, "test 1");
+  popup.scroll(0, 100);
+
+  popup.history.pushState("", "", "?pushed");
+  is(Math.round(popup.scrollY), 100, "test 2");
+  popup.scroll(0, 200); // set state-2's position to 200
+
+  popup.history.back();
+  continueAsync();
+  yield;
+  is(Math.round(popup.scrollY), 100, "test 3");
+  popup.scroll(0, 150); // set original page's position to 150
+
+  popup.history.forward();
+  continueAsync();
+  yield;
+  is(Math.round(popup.scrollY), 200, "test 4");
+
+  popup.history.back();
+  continueAsync();
+  yield;
+  is(Math.round(popup.scrollY), 150, "test 5");
+
+  popup.history.forward();
+  continueAsync();
+  yield;
+  is(Math.round(popup.scrollY), 200, "test 6");
+
+  // At this point, the history looks like:
+  //   PATH                         POSITION
+  //   file_bug590573_1.html        150       <-- oldest
+  //   file_bug590573_1.html?pushed 200       <-- newest, current
+
+  // Now test that the scroll position is persisted when we have real
+  // navigations involved.  First, we need to spin the event loop so that the
+  // navigation doesn't replace our current history entry.
+
+  setTimeout(pageLoad, 0);
+  yield;
+
+  page2LoadCallbackEnabled = true;
+  popup.location = "file_bug590573_2.html";
+  yield;
+
+  ok(popup.location.href.match("file_bug590573_2.html$"),
+     "Location was " + popup.location +
+     " but should end with file_bug590573_2.html");
+
+  is(popup.scrollY, 0, "test 7");
+  popup.scroll(0, 300);
+
+  // We need to spin the event loop again before we go back, otherwise the
+  // scroll positions don't get updated properly.
+  setTimeout(pageLoad, 0);
+  yield;
+
+  page1PageShowCallbackEnabled = true;
+  popup.history.back();
+  yield;
+
+  // Spin the event loop again so that we get the right scroll positions.
+  setTimeout(pageLoad, 0);
+  yield;
+
+  is(popup.location.search, "?pushed");
+  ok(popup.document.getElementById("div1"), "page should have div1.");
+
+  is(Math.round(popup.scrollY), 200, "test 8");
+
+  popup.history.back();
+  continueAsync();
+  yield;
+  is(Math.round(popup.scrollY), 150, "test 9");
+  popup.history.forward();
+  continueAsync();
+  yield;
+
+  is(Math.round(popup.scrollY), 200, "test 10");
+
+  // Spin one last time...
+  setTimeout(pageLoad, 0);
+  yield;
+
+  page2PageShowCallbackEnabled = true;
+  popup.history.forward();
+  yield;
+
+  // Bug 821821, on Android tegras we get 299 instead of 300 sometimes
+  const scrollY = Math.floor(popup.scrollY);
+  if (scrollY >= 299 && scrollY <= 300) {
+    is(1, 1, "test 11");
+  } else {
+    is(1, 0, "test 11, got " + popup.scrollY + " for popup.scrollY instead of 299|300");
+  }
+  popup.close();
+}
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug598895.html b/docshell/test/mochitest/test_bug598895.html
new file mode 100644
index 0000000000..e0b17e2663
--- /dev/null
+++ b/docshell/test/mochitest/test_bug598895.html
@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=598895
+-->
+<head>
+  <title>Test for Bug 598895</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=598895">Mozilla Bug 598895</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 598895 */
+SimpleTest.waitForExplicitFinish();
+
+addLoadEvent(function() {
+var win1 = window.open();
+win1.document.body.textContent = "Should show";
+
+var windowsLoaded = 0;
+
+window.onmessage = async function(ev) {
+  is(ev.data, "loaded", "Message should be 'loaded'");
+  if (++windowsLoaded == 2) {
+    var one = await snapshotWindow(win1);
+    var two = await snapshotWindow(win2);
+    var three = await snapshotWindow(win3);
+    win1.close();
+    win2.close();
+    win3.close();
+    ok(compareSnapshots(one, two, true)[0], "Popups should look identical");
+    ok(compareSnapshots(one, three, false)[0], "Popups should not look identical");
+
+    SimpleTest.finish();
+  }
+};
+
+var win2 = window.open("file_bug598895_1.html");
+var win3 = window.open("file_bug598895_2.html");
+});
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug634834.html b/docshell/test/mochitest/test_bug634834.html
new file mode 100644
index 0000000000..e1f87de000
--- /dev/null
+++ b/docshell/test/mochitest/test_bug634834.html
@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=634834
+-->
+<head>
+  <title>Test for Bug 634834</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=634834">Mozilla Bug 634834</a>
+
+<script type='application/javascript'>
+SimpleTest.waitForExplicitFinish();
+
+function iframe_loaded() {
+  var loadedAfterPushstate = false;
+  $("iframe").onload = function() {
+    loadedAfterPushstate = true;
+  };
+
+  var obj = { name: "name" };
+  obj.__defineGetter__("a", function() {
+    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+    $("iframe").contentWindow.location = "http://example.com";
+
+    // Wait until we've loaded example.com.
+    do {
+        var r = new XMLHttpRequest();
+        r.open("GET", location.href, false);
+        r.overrideMimeType("text/plain");
+        try { r.send(null); } catch (e) {}
+    } while (!loadedAfterPushstate);
+  });
+
+  try {
+    $("iframe").contentWindow.history.pushState(obj, "");
+    ok(false, "pushState should throw exception.");
+  } catch (e) {
+    ok(true, "pushState threw an exception.");
+  }
+  SimpleTest.finish();
+}
+
+</script>
+
+<iframe id='iframe' src='file_bug634834.html' onload='iframe_loaded()'></iframe>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug637644.html b/docshell/test/mochitest/test_bug637644.html
new file mode 100644
index 0000000000..1e5f4380b4
--- /dev/null
+++ b/docshell/test/mochitest/test_bug637644.html
@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=637644
+-->
+<head>
+  <title>Test for Bug 637644</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=637644">Mozilla Bug 637644</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 637644 */
+SimpleTest.waitForExplicitFinish();
+
+addLoadEvent(function() {
+var win1 = window.open("", "", "height=500,width=500");
+win1.document.body.textContent = "Should show";
+
+var windowsLoaded = 0;
+
+window.onmessage = async function(ev) {
+  is(ev.data, "loaded", "Message should be 'loaded'");
+  if (++windowsLoaded == 2) {
+    var one = await snapshotWindow(win1);
+    var two = await snapshotWindow(win2);
+    var three = await snapshotWindow(win3);
+    win1.close();
+    win2.close();
+    win3.close();
+    ok(compareSnapshots(one, two, true)[0], "Popups should look identical");
+    ok(compareSnapshots(one, three, false)[0], "Popups should not look identical");
+
+    SimpleTest.finish();
+  }
+};
+
+var win2 = window.open("file_bug637644_1.html", "", "height=500,width=500");
+var win3 = window.open("file_bug637644_2.html", "", "height=500,width=500");
+});
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug640387_1.html b/docshell/test/mochitest/test_bug640387_1.html
new file mode 100644
index 0000000000..b8aab054a1
--- /dev/null
+++ b/docshell/test/mochitest/test_bug640387_1.html
@@ -0,0 +1,107 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=640387
+-->
+<head>
+  <title>Test for Bug 640387</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=640387">Mozilla Bug 640387</a>
+
+<script type='application/javascript'>
+SimpleTest.waitForExplicitFinish();
+
+function* test() {
+  /* Spin the event loop so we get out of the onload handler. */
+  SimpleTest.executeSoon(function() { gGen.next(); });
+  yield undefined;
+
+  popup.history.pushState("", "", "#hash1");
+  popup.history.pushState("", "", "#hash2");
+
+  // Now the history looks like:
+  //   file_bug640387.html
+  //   file_bug640387.html#hash1
+  //   file_bug640387.html#hash2  <-- current
+
+  // Going back should trigger a hashchange, which will wake us up from the
+  // yield.
+  popup.history.back();
+  yield undefined;
+  ok(true, "Got first hashchange.");
+
+  // Going back should wake us up again.
+  popup.history.back();
+  yield undefined;
+  ok(true, "Got second hashchange.");
+
+  // Now the history looks like:
+  //   file_bug640387.html        <-- current
+  //   file_bug640387.html#hash1
+  //   file_bug640387.html#hash2
+
+  // Going forward should trigger a hashchange.
+  popup.history.forward();
+  yield undefined;
+  ok(true, "Got third hashchange.");
+
+  // Now modify the history so it looks like:
+  //   file_bug640387.html
+  //   file_bug640387.html#hash1
+  //   file_bug640387.html#hash1  <-- current
+  popup.history.pushState("", "", "#hash1");
+
+  // Now when we go back, we should not get a hashchange.  Instead, wait for a
+  // popstate.  We need to asynchronously go back because popstate is fired
+  // sync.
+  gHashchangeExpected = false;
+  gCallbackOnPopstate = true;
+  SimpleTest.executeSoon(function() { popup.history.back(); });
+  yield undefined;
+  ok(true, "Got popstate.");
+  gCallbackOnPopstate = false;
+
+  // Spin the event loop so hashchange has a chance to fire, if it's going to.
+  SimpleTest.executeSoon(function() { gGen.next(); });
+  yield undefined;
+
+  popup.close();
+  SimpleTest.finish();
+}
+
+var gGen = null;
+function childLoad() {
+  gGen = test();
+  gGen.next();
+}
+
+var gHashchangeExpected = true;
+function childHashchange() {
+  if (gHashchangeExpected) {
+    gGen.next();
+  } else {
+    ok(false, "Got hashchange when we weren't expecting one.");
+  }
+}
+
+var gCallbackOnPopstate = false;
+function childPopstate() {
+  if (gCallbackOnPopstate) {
+    gGen.next();
+  }
+}
+
+/* We need to run this test in a popup, because navigating an iframe
+ * back/forwards tends to cause intermittent orange. */
+var popup = window.open("file_bug640387.html");
+
+/* Control now flows up to childLoad(), called once the popup loads. */
+
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug640387_2.html b/docshell/test/mochitest/test_bug640387_2.html
new file mode 100644
index 0000000000..c248a64836
--- /dev/null
+++ b/docshell/test/mochitest/test_bug640387_2.html
@@ -0,0 +1,89 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=640387
+-->
+<head>
+  <title>Test for Bug 640387</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=640387">Mozilla Bug 640387</a>
+
+<!-- Test that, when going from
+
+  http://example.com/#foo
+
+to
+
+  http://example.com/
+
+via a non-history load, we do a true load, rather than a scroll. -->
+
+<script type='application/javascript'>
+SimpleTest.waitForExplicitFinish();
+
+var callbackOnLoad = false;
+function childLoad() {
+  if (callbackOnLoad) {
+    callbackOnLoad = false;
+    gGen.next();
+  }
+}
+
+var errorOnHashchange = false;
+var callbackOnHashchange = false;
+function childHashchange() {
+  if (errorOnHashchange) {
+    ok(false, "Got unexpected hashchange.");
+  }
+  if (callbackOnHashchange) {
+    callbackOnHashchange = false;
+    gGen.next();
+  }
+}
+
+function* run_test() {
+  var iframe = $("iframe").contentWindow;
+
+  ok(true, "Got first load");
+
+  // Spin the event loop so we exit the onload handler.
+  SimpleTest.executeSoon(function() { gGen.next(); });
+  yield undefined;
+
+  let origLocation = iframe.location + "";
+  callbackOnHashchange = true;
+  iframe.location.hash = "#1";
+  // Wait for a hashchange event.
+  yield undefined;
+
+  ok(true, "Got hashchange.");
+
+  iframe.location = origLocation;
+  // This should produce a load event and *not* a hashchange, because the
+  // result of the load is a different document than we had previously.
+  callbackOnLoad = true;
+  errorOnHashchange = true;
+  yield undefined;
+
+  ok(true, "Got final load.");
+
+  // Spin the event loop to give hashchange a chance to fire, if it's going to.
+  SimpleTest.executeSoon(function() { gGen.next(); });
+  yield undefined;
+
+  SimpleTest.finish();
+}
+
+callbackOnLoad = true;
+var gGen = run_test();
+
+</script>
+
+<iframe id='iframe' src='file_bug640387.html'></iframe>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug653741.html b/docshell/test/mochitest/test_bug653741.html
new file mode 100644
index 0000000000..33ba7077e4
--- /dev/null
+++ b/docshell/test/mochitest/test_bug653741.html
@@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=653741
+-->
+<head>
+  <title>Test for Bug 653741</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=653741">Mozilla Bug 653741</a>
+
+<script type="application/javascript">
+
+/** Test for Bug 653741 */
+SimpleTest.waitForExplicitFinish();
+
+function childLoad() {
+  // Spin the event loop so we leave the onload handler.
+  SimpleTest.executeSoon(childLoad2);
+}
+
+function childLoad2() {
+  let cw = $("iframe").contentWindow;
+
+  // Save the Y offset.  For sanity's sake, make sure it's not 0, because we
+  // should be at the bottom of the page!
+  let origYOffset = Math.round(cw.pageYOffset);
+  ok(origYOffset != 0, "Original Y offset is not 0.");
+
+  // Scroll the iframe to the top, then navigate to #bottom again.
+  cw.scrollTo(0, 0);
+
+  // Our current location is #bottom, so this should scroll us down to the
+  // bottom again.
+  cw.location = cw.location + "";
+
+  is(Math.round(cw.pageYOffset), origYOffset, "Correct offset after reloading page.");
+  SimpleTest.finish();
+}
+
+</script>
+
+<iframe height='100px' id='iframe' src='file_bug653741.html#bottom'></iframe>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug660404.html b/docshell/test/mochitest/test_bug660404.html
new file mode 100644
index 0000000000..94e3f67aa1
--- /dev/null
+++ b/docshell/test/mochitest/test_bug660404.html
@@ -0,0 +1,76 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=660404
+-->
+<head>
+  <title>Test for Bug 660404</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=660404">Mozilla Bug 660404</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 660404 */
+SimpleTest.waitForExplicitFinish();
+
+var textContent =
+`
+  var bc = new BroadcastChannel("bug660404_multipart");
+  bc.postMessage({command: "finishTest",
+    textContent: window.document.documentElement.textContent,
+    innerHTML: window.document.documentElement.innerHTML
+  });
+  bc.close();
+  window.close();
+`;
+var innerHTML =
+`<head><script>
+  var bc = new BroadcastChannel("bug660404_multipart");
+  bc.postMessage({command: "finishTest",
+    textContent: window.document.documentElement.textContent,
+    innerHTML: window.document.documentElement.innerHTML
+  });
+  bc.close();
+  window.close();
+</`
+// eslint-disable-next-line no-useless-concat
++ `script></head>`
+;
+var bc_multipart = new BroadcastChannel("bug660404_multipart");
+bc_multipart.onmessage = (msgEvent) => {
+    var msg = msgEvent.data;
+    var command = msg.command;
+    if (command == "finishTest") {
+      is(msg.textContent, textContent);
+      is(msg.innerHTML, innerHTML);
+      bc_multipart.close();
+      SimpleTest.finish();
+    }
+}
+var bc = new BroadcastChannel("bug660404");
+bc.onmessage = (msgEvent) => {
+    var msg = msgEvent.data;
+    var command = msg.command;
+    if (command == "pagehide") {
+      is(msg.persisted, true, "Should be bfcached when navigating to multipart");
+      bc.close();
+    }
+}
+
+// If Fission is disabled, the pref is no-op.
+SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+  // Have to open a new window, since there's no bfcache in subframes
+  window.open("file_bug660404-1.html", "", "noopener");
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug662170.html b/docshell/test/mochitest/test_bug662170.html
new file mode 100644
index 0000000000..d25ee3bd0f
--- /dev/null
+++ b/docshell/test/mochitest/test_bug662170.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=662170
+-->
+<head>
+  <title>Test for Bug 662170</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=662170">Mozilla Bug 662170</a>
+
+<script type="application/javascript">
+
+/** Test for Bug 662170 */
+SimpleTest.waitForExplicitFinish();
+
+function childLoad() {
+  // Spin the event loop so we leave the onload handler.
+  SimpleTest.executeSoon(childLoad2);
+}
+
+function childLoad2() {
+  let cw = $("iframe").contentWindow;
+
+  // When we initially load the page, we should be at the top.
+  is(cw.pageYOffset, 0, "Initial Y offset should be 0.");
+
+  // Scroll the iframe to the bottom.
+  cw.scrollTo(0, 300);
+
+  // Did we actually scroll somewhere?
+  isnot(Math.round(cw.pageYOffset), 0, "Y offset should be non-zero after scrolling.");
+
+  // Now load file_bug662170.html#, which should take us to the top of the
+  // page.
+  cw.location = cw.location + "#";
+
+  is(cw.pageYOffset, 0, "Correct Y offset after loading #.");
+  SimpleTest.finish();
+}
+
+</script>
+
+<!-- When the iframe loads, it calls childLoad(). -->
+<iframe height='100px' id='iframe' src='file_bug662170.html'></iframe>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug668513.html b/docshell/test/mochitest/test_bug668513.html
new file mode 100644
index 0000000000..09c848b6c1
--- /dev/null
+++ b/docshell/test/mochitest/test_bug668513.html
@@ -0,0 +1,28 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=668513
+-->
+<head>
+  <title>Test for Bug 668513</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=668513">Mozilla Bug 668513</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+if (navigator.platform.startsWith("Linux")) {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+SimpleTest.waitForExplicitFinish();
+window.open("file_bug668513.html");
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug669671.html b/docshell/test/mochitest/test_bug669671.html
new file mode 100644
index 0000000000..4470cd6682
--- /dev/null
+++ b/docshell/test/mochitest/test_bug669671.html
@@ -0,0 +1,145 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=669671
+-->
+<head>
+  <title>Test for Bug 669671</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=669671">Mozilla Bug 669671</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/**
+ * Test for Bug 669671.
+ *
+ * This is a bit complicated.  We have a script, file_bug669671.sjs, which counts
+ * how many times it's loaded and returns that count in the body of an HTML
+ * document.  For brevity, call this page X.
+ *
+ * X is sent with Cache-Control: max-age=0 and can't be bfcached (it has an
+ * onunload handler).  Our test does the following in a popup:
+ *
+ * 1) Load X?pushed, to prime the cache.
+ * 2) Navigate to X.
+ * 3) Call pushState and navigate from X to X?pushed.
+ * 4) Navigate to X?navigated.
+ * 5) Go back (to X?pushed).
+ *
+ * We do all this work so we can check that in step 5, we fetch X?pushed from
+ * the network -- we shouldn't use our cached copy, because of the
+ * cache-control header X sends.
+ *
+ * Then we go back and repeat the whole process but call history.replaceState
+ * instead of pushState.  And for good measure, we test once more, this time
+ * modifying only the hash of the URI using replaceState.  In this case, we
+ * should* load from the cache.
+ *
+ */
+SimpleTest.requestLongerTimeout(2);
+SimpleTest.waitForExplicitFinish();
+
+function onChildLoad() {
+  SimpleTest.executeSoon(function() { gGen.next(); });
+}
+
+var _loadCount = 0;
+function checkPopupLoadCount() {
+  is(popup.document.body.innerHTML, _loadCount + "", "Load count");
+
+  // We normally want to increment _loadCount here.  But if the test fails
+  // because we didn't do a load we should have, let's not cause a cascade of
+  // failures by incrementing _loadCount.
+  var origCount = _loadCount;
+  if (popup.document.body.innerHTML >= _loadCount + "")
+    _loadCount++;
+  return origCount;
+}
+
+function* test() {
+  // Step 0 - Make sure the count is reset to 0 in case of reload
+  popup.location = "file_bug669671.sjs?countreset";
+  yield;
+  is(popup.document.body.innerHTML, "0",
+     "Load count should be reset to 0");
+
+  // Step 1 - The popup's body counts how many times we've requested the
+  // resource.  This is the first time we've requested it, so it should be '0'.
+  checkPopupLoadCount();
+
+  // Step 2 - We'll get another onChildLoad when this finishes.
+  popup.location = "file_bug669671.sjs";
+  yield undefined;
+
+  // Step 3 - Call pushState and change the URI back to ?pushed.
+  checkPopupLoadCount();
+  popup.history.pushState("", "", "?pushed");
+
+  // Step 4 - Navigate away.  This should trigger another onChildLoad.
+  popup.location = "file_bug669671.sjs?navigated-1";
+  yield undefined;
+
+  // Step 5 - Go back.  This should result in another onload (because the file is
+  // not in bfcache) and should be the fourth time we've requested the sjs file.
+  checkPopupLoadCount();
+  popup.history.back();
+  yield undefined;
+
+  // This is the check which was failing before we fixed the bug.
+  checkPopupLoadCount();
+
+  popup.close();
+
+  // Do the whole thing again, but with replaceState.
+  popup = window.open("file_bug669671.sjs?replaced");
+  yield undefined;
+  checkPopupLoadCount();
+  popup.location = "file_bug669671.sjs";
+  yield undefined;
+  checkPopupLoadCount();
+  popup.history.replaceState("", "", "?replaced");
+  popup.location = "file_bug669671.sjs?navigated-2";
+  yield undefined;
+  checkPopupLoadCount();
+  popup.history.back();
+  yield undefined;
+  checkPopupLoadCount();
+  popup.close();
+
+  // Once more, with feeling.  Notice that we don't have to prime the cache
+  // with an extra load here, because X and X#hash share the same cache entry.
+  popup = window.open("file_bug669671.sjs?hash-test");
+  yield undefined;
+  var initialCount = checkPopupLoadCount();
+  popup.history.replaceState("", "", "#hash");
+  popup.location = "file_bug669671.sjs?navigated-3";
+  yield undefined;
+  checkPopupLoadCount();
+  popup.history.back();
+  yield undefined;
+  is(popup.document.body.innerHTML, initialCount + "",
+     "Load count (should be cached)");
+  popup.close();
+
+  SimpleTest.finish();
+}
+
+var gGen = test();
+var popup;
+
+// Disable RCWN to make cache behavior deterministic.
+SpecialPowers.pushPrefEnv({set: [["network.http.rcwn.enabled", false]]}, () => {
+  // This will call into onChildLoad once it loads.
+  popup = window.open("file_bug669671.sjs?pushed");
+});
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug675587.html b/docshell/test/mochitest/test_bug675587.html
new file mode 100644
index 0000000000..452bbc8058
--- /dev/null
+++ b/docshell/test/mochitest/test_bug675587.html
@@ -0,0 +1,33 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=675587
+-->
+<head>
+  <title>Test for Bug 675587</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=675587">Mozilla Bug 675587</a>
+<p id="display">
+  <iframe src="file_bug675587.html#hash"></iframe>
+</p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 675587 */
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+  ok(window.frames[0].location.href.endsWith("file_bug675587.html#"),
+     "Should have the right href");
+  SimpleTest.finish();
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug680257.html b/docshell/test/mochitest/test_bug680257.html
new file mode 100644
index 0000000000..4d5736ac0a
--- /dev/null
+++ b/docshell/test/mochitest/test_bug680257.html
@@ -0,0 +1,76 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=680257
+-->
+<head>
+  <title>Test for Bug 680257</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=680257">Mozilla Bug 680257</a>
+
+<script type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var popup = window.open("file_bug680257.html");
+
+var gTestContinuation = null;
+function continueAsync() {
+  popup.addEventListener("hashchange",
+    function(e) { gTestContinuation.next(); }, { once: true });
+}
+
+// The popup will call into popupLoaded() once it loads.
+function popupLoaded() {
+  // runTests() needs to be called from outside popupLoaded's onload handler.
+  // Otherwise, the navigations we do in runTests won't create new SHEntries.
+  SimpleTest.executeSoon(function() {
+    if (!gTestContinuation) {
+      gTestContinuation = runTests();
+    }
+    gTestContinuation.next();
+  });
+}
+
+function* runTests() {
+  checkPopupLinkStyle(false, "Initial");
+
+  popup.location.hash = "a";
+  continueAsync();
+  yield;
+  checkPopupLinkStyle(true, "After setting hash");
+
+  popup.history.back();
+  continueAsync();
+  yield;
+
+  checkPopupLinkStyle(false, "After going back");
+
+  popup.history.forward();
+  continueAsync();
+  yield;
+  checkPopupLinkStyle(true, "After going forward");
+
+  popup.close();
+  SimpleTest.finish();
+}
+
+function checkPopupLinkStyle(isTarget, desc) {
+  var link = popup.document.getElementById("a");
+  var style = popup.getComputedStyle(link);
+  var color = style.getPropertyValue("color");
+
+  // Color is red if isTarget, black otherwise.
+  if (isTarget) {
+    is(color, "rgb(255, 0, 0)", desc);
+  } else {
+    is(color, "rgb(0, 0, 0)", desc);
+  }
+}
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug691547.html b/docshell/test/mochitest/test_bug691547.html
new file mode 100644
index 0000000000..706cd5013b
--- /dev/null
+++ b/docshell/test/mochitest/test_bug691547.html
@@ -0,0 +1,59 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=691547
+-->
+<head>
+  <title>Test for Bug 691547</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+     var navStart = 0;
+     var beforeReload = 0;
+     function onContentLoad() {
+       var frame = frames[0];
+       if (!navStart) {
+         // First time we perform navigation in subframe. The bug is that
+         // load in subframe causes timing.navigationStart to be recorded
+         // as if it was a start of the next navigation.
+         var innerFrame = frame.frames[0];
+         navStart = frame.performance.timing.navigationStart;
+         innerFrame.location = "bug570341_recordevents.html";
+         // Let's wait a bit so the difference is clear anough.
+         setTimeout(reload, 3000);
+       } else {
+         // Content reloaded, time to check. We are allowing a huge time slack,
+         // in case clock is imprecise. If we have a bug, the difference is
+         // expected to be about the timeout value set above.
+         var diff = frame.performance.timing.navigationStart - beforeReload;
+         ok(diff >= -200,
+            "navigationStart should be set after reload request. " +
+            "Measured difference: " + diff + " (should be positive)");
+         SimpleTest.finish();
+       }
+     }
+     function reload() {
+       var frame = frames[0];
+       ok(navStart == frame.performance.timing.navigationStart,
+          "navigationStart should not change when frame loads.");
+       beforeReload = Date.now();
+       frame.location.reload();
+     }
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=570341">Mozilla Bug 570341</a>
+<div id="frames">
+<iframe name="frame0" id="frame0" src="bug691547_frame.html" onload="onContentLoad()"></iframe>
+</div>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug694612.html b/docshell/test/mochitest/test_bug694612.html
new file mode 100644
index 0000000000..8ea4331c43
--- /dev/null
+++ b/docshell/test/mochitest/test_bug694612.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=694612
+-->
+<head>
+  <title>Test for Bug 694612</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=694612">Mozilla Bug 694612</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+/** Test for Bug 694612 */
+SimpleTest.waitForExplicitFinish();
+
+window.addEventListener("message", receiveMessage);
+function receiveMessage(event) {
+  ok(event.data.result, "should have performance API in an <object>");
+  window.removeEventListener("message", receiveMessage);
+  SimpleTest.finish();
+}
+</script>
+<object type="text/html"
+        data="data:text/html,<script>parent.postMessage({result:performance!=null},'*');</script>">
+</object>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug703855.html b/docshell/test/mochitest/test_bug703855.html
new file mode 100644
index 0000000000..4aa7b08800
--- /dev/null
+++ b/docshell/test/mochitest/test_bug703855.html
@@ -0,0 +1,79 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=703855
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 703855</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=703855">Mozilla Bug 703855</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <iframe id="f" src="file_bug703855.html"></iframe>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 703855 */
+
+SimpleTest.waitForExplicitFinish();
+
+var timingAttributes = [
+  "connectEnd",
+  "connectStart",
+  "domComplete",
+  "domContentLoadedEventEnd",
+  "domContentLoadedEventStart",
+  "domInteractive",
+  "domLoading",
+  "domainLookupEnd",
+  "domainLookupStart",
+  "fetchStart",
+  "loadEventEnd",
+  "loadEventStart",
+  "navigationStart",
+  "redirectEnd",
+  "redirectStart",
+  "requestStart",
+  "responseEnd",
+  "responseStart",
+  "unloadEventEnd",
+  "unloadEventStart",
+];
+var originalTiming = {};
+
+function runTest() {
+  var timing = $("f").contentWindow.performance.timing;
+  for (let i in timingAttributes) {
+    originalTiming[timingAttributes[i]] = timing[timingAttributes[i]];
+  }
+
+  var doc = $("f").contentDocument;
+  doc.open();
+  doc.write("<!DOCTYPE html>");
+  doc.close();
+
+  SimpleTest.executeSoon(function() {
+    var newTiming = $("f").contentWindow.performance.timing;
+    for (let i in timingAttributes) {
+      is(newTiming[timingAttributes[i]], originalTiming[timingAttributes[i]],
+         "document.open should not affect value of " + timingAttributes[i]);
+    }
+    SimpleTest.finish();
+  });
+}
+
+addLoadEvent(function() {
+  SimpleTest.executeSoon(runTest);
+});
+
+
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug728939.html b/docshell/test/mochitest/test_bug728939.html
new file mode 100644
index 0000000000..168184099a
--- /dev/null
+++ b/docshell/test/mochitest/test_bug728939.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=728939
+-->
+<head>
+  <title>Test for Bug 728939</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=728939">Mozilla Bug 728939</a>
+
+<script type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+// Called when the popup finishes loading.
+function popupLoaded() {
+  popup.location.hash = "#foo";
+  is(popup.document.URL, popup.location.href, "After hashchange.");
+
+  popup.history.pushState("", "", "bar");
+  is(popup.document.URL, popup.location.href, "After pushState.");
+
+  popup.history.replaceState("", "", "baz");
+  is(popup.document.URL, popup.location.href, "After replaceState.");
+
+  popup.close();
+  SimpleTest.finish();
+}
+
+var popup = window.open("file_bug728939.html");
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_bug797909.html b/docshell/test/mochitest/test_bug797909.html
new file mode 100644
index 0000000000..15b7c27c0f
--- /dev/null
+++ b/docshell/test/mochitest/test_bug797909.html
@@ -0,0 +1,66 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=797909
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 797909</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=797909">Mozilla Bug 797909</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+  /** Test for Bug 797909 */
+
+  SimpleTest.waitForExplicitFinish();
+
+  function runTest() {
+    var iframe = document.getElementById("ifr");
+    try {
+      iframe.contentWindow.document;
+      ok(false, "Should have thrown an exception");
+    } catch (ex) {
+      ok(true, "Got an exception");
+    }
+
+    iframe = document.createElement("iframe");
+    // set sandbox attribute
+    iframe.sandbox = "allow-scripts";
+    // and then insert into the doc
+    document.body.appendChild(iframe);
+
+    try {
+      iframe.contentWindow.document;
+      ok(false, "Should have thrown an exception");
+    } catch (ex) {
+      ok(true, "Got an exception");
+    }
+
+    iframe = document.createElement("iframe");
+    // set sandbox attribute
+    iframe.sandbox = "allow-same-origin";
+    // and then insert into the doc
+    document.body.appendChild(iframe);
+
+    try {
+      iframe.contentWindow.document;
+      ok(true, "Shouldn't have thrown an exception");
+    } catch (ex) {
+      ok(false, "Got an unexpected exception");
+    }
+
+    SimpleTest.finish();
+  }
+
+</script>
+</pre>
+<iframe id="ifr" sandbox = "allow-scripts"></iframe>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_close_onpagehide_by_history_back.html b/docshell/test/mochitest/test_close_onpagehide_by_history_back.html
new file mode 100644
index 0000000000..33140502f7
--- /dev/null
+++ b/docshell/test/mochitest/test_close_onpagehide_by_history_back.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<title>Test for closing window in pagehide event callback caused by history.back()</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1432396">Mozilla Bug 1432396</a>
+<p id="display"></p>
+<script>
+SimpleTest.waitForExplicitFinish();
+
+const w = window.open("file_close_onpagehide1.html");
+window.addEventListener("message", e => {
+  is(e.data, "initial", "The initial page loaded");
+  window.addEventListener("message", evt => {
+    is(evt.data, "second", "The second page loaded");
+    w.onpagehide = () => {
+      w.close();
+      info("try to close the popped up window in onpagehide");
+      SimpleTest.finish();
+    };
+    w.history.back();
+  }, { once: true });
+  w.location = "file_close_onpagehide2.html";
+}, { once: true });
+</script>
diff --git a/docshell/test/mochitest/test_close_onpagehide_by_window_close.html b/docshell/test/mochitest/test_close_onpagehide_by_window_close.html
new file mode 100644
index 0000000000..8b094cdaa4
--- /dev/null
+++ b/docshell/test/mochitest/test_close_onpagehide_by_window_close.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<title>Test for closing window in pagehide event callback caused by window.close()</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1432396">Mozilla Bug 1432396</a>
+<p id="display"></p>
+<script>
+SimpleTest.waitForExplicitFinish();
+
+const w = window.open("file_close_onpagehide1.html");
+window.addEventListener("message", e => {
+  is(e.data, "initial", "The initial page loaded");
+  w.onpagehide = () => {
+    w.close();
+    info("try to close the popped up window in onpagehide");
+    SimpleTest.finish();
+  };
+  w.close();
+}, { once: true });
+</script>
diff --git a/docshell/test/mochitest/test_compressed_multipart.html b/docshell/test/mochitest/test_compressed_multipart.html
new file mode 100644
index 0000000000..438819b643
--- /dev/null
+++ b/docshell/test/mochitest/test_compressed_multipart.html
@@ -0,0 +1,41 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1600211
+
+Loads a document that is served as multipart/x-mixed-replace as well as gzip compressed.
+Checks that we correctly decompress and display it (via running JS within the document to notify us).
+-->
+<head>
+  <title>Test for Bug 1600211</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1600211">Mozilla Bug 1600211</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 1600211 */
+SimpleTest.waitForExplicitFinish();
+
+var w;
+
+function finishTest() {
+  is(w.document.documentElement.textContent, "opener.finishTest();");
+  is(w.document.documentElement.innerHTML, "<head><script>opener.finishTest();</" +
+                                           "script></head>");
+  w.close();
+  SimpleTest.finish();
+}
+
+w = window.open("file_compressed_multipart");
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_content_javascript_loads.html b/docshell/test/mochitest/test_content_javascript_loads.html
new file mode 100644
index 0000000000..eabc1d314e
--- /dev/null
+++ b/docshell/test/mochitest/test_content_javascript_loads.html
@@ -0,0 +1,163 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Test for Bug 1647519</title>
+  <meta charset="utf-8">
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1647519">Mozilla Bug 1647519</a>
+
+<script type="application/javascript">
+"use strict";
+
+function promiseMessage(source, filter = event => true) {
+  return new Promise(resolve => {
+    function listener(event) {
+      if (event.source == source && filter(event)) {
+        window.removeEventListener("message", listener);
+        resolve(event);
+      }
+    }
+    window.addEventListener("message", listener);
+  });
+}
+
+async function runTests(resourcePath) {
+  /* globals Assert, content */
+  let doc = content.document;
+
+  // Sends a message to the given target window and waits for a response a few
+  // times to (more or less) ensure that a `javascript:` load request has had
+  // time to succeed, if it were going to.
+  async function doSomeRoundTrips(target) {
+    for (let i = 0; i < 3; i++) {
+      // Note: The ping message needs to be sent from a script running in the
+      // content scope or there will be no source window for the reply to be
+      // sent to.
+      await content.wrappedJSObject.ping(target);
+    }
+  }
+
+  function promiseEvent(target, name) {
+    return new Promise(resolve => {
+      target.addEventListener(name, resolve, { once: true });
+    });
+  }
+
+  function createIframe(host, id) {
+    let iframe = doc.createElement("iframe");
+    iframe.id = id;
+    iframe.name = id;
+    iframe.src = `https://${host}${resourcePath}file_content_javascript_loads_frame.html`;
+    doc.body.appendChild(iframe);
+    return promiseEvent(iframe, "load");
+  }
+
+  const ID_SAME_ORIGIN = "frame-same-origin";
+  const ID_SAME_BASE_DOMAIN = "frame-same-base-domain";
+  const ID_CROSS_BASE_DOMAIN = "frame-cross-base-domain";
+
+  await Promise.all([
+    createIframe("example.com", ID_SAME_ORIGIN),
+    createIframe("test1.example.com", ID_SAME_BASE_DOMAIN),
+    createIframe("example.org", ID_CROSS_BASE_DOMAIN),
+  ]);
+
+  let gotJSLoadFrom = null;
+  let pendingJSLoadID = null;
+  content.addEventListener("message", event => {
+    if ("javascriptLoadID" in event.data) {
+      Assert.equal(
+        event.data.javascriptLoadID,
+        pendingJSLoadID,
+        "Message from javascript: load should have the expected ID"
+      );
+      Assert.equal(
+        gotJSLoadFrom,
+        null,
+        "Should not have seen a previous load message this cycle"
+      );
+      gotJSLoadFrom = event.source.name;
+    }
+  });
+
+  async function watchForJSLoads(frameName, expected, task) {
+    let loadId = Math.random();
+
+    let jsURI =
+      "javascript:" +
+      encodeURI(`parent.postMessage({ javascriptLoadID: ${loadId} }, "*")`);
+
+    pendingJSLoadID = loadId;
+    gotJSLoadFrom = null;
+
+    await task(jsURI);
+
+    await doSomeRoundTrips(content.wrappedJSObject[frameName]);
+
+    if (expected) {
+      Assert.equal(
+        gotJSLoadFrom,
+        frameName,
+        `Should have seen javascript: URI loaded into ${frameName}`
+      );
+    } else {
+      Assert.equal(
+        gotJSLoadFrom,
+        null,
+        "Should not have seen javascript: URI loaded"
+      );
+    }
+  }
+
+  let frames = [
+    { name: ID_SAME_ORIGIN, expectLoad: true },
+    { name: ID_SAME_BASE_DOMAIN, expectLoad: false },
+    { name: ID_CROSS_BASE_DOMAIN, expectLoad: false },
+  ];
+  for (let { name, expectLoad } of frames) {
+    info(`Checking loads for frame "${name}". Expecting loads: ${expectLoad}`);
+
+    info("Checking location setter");
+    await watchForJSLoads(name, expectLoad, jsURI => {
+      // Note: We need to do this from the content scope since security checks
+      // depend on the JS caller scope.
+      content.wrappedJSObject.setFrameLocation(name, jsURI);
+    });
+
+    info("Checking targeted <a> load");
+    await watchForJSLoads(name, expectLoad, jsURI => {
+      let a = doc.createElement("a");
+      a.target = name;
+      a.href = jsURI;
+      doc.body.appendChild(a);
+      a.click();
+      a.remove();
+    });
+
+    info("Checking targeted window.open load");
+    await watchForJSLoads(name, expectLoad, jsURI => {
+      content.wrappedJSObject.open(jsURI, name);
+    });
+  }
+}
+
+add_task(async function() {
+  const resourcePath = location.pathname.replace(/[^\/]+$/, "");
+
+  let win = window.open(
+    `https://example.com${resourcePath}file_content_javascript_loads_root.html`
+  );
+  await promiseMessage(win, event => event.data == "ready");
+
+  await SpecialPowers.spawn(win, [resourcePath], runTests);
+
+  win.close();
+});
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_double_submit.html b/docshell/test/mochitest/test_double_submit.html
new file mode 100644
index 0000000000..640930718d
--- /dev/null
+++ b/docshell/test/mochitest/test_double_submit.html
@@ -0,0 +1,98 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Test for Bug 1590762</title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <body>
+    <iframe name="targetFrame" id="targetFrame"></iframe>
+    <form id="form" action="double_submit.sjs?delay=1000" method="POST" target="targetFrame">
+      <input id="token" type="text" name="token" value="">
+      <input id="button" type="submit">
+    </form>
+    <script>
+      "use strict";
+
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      const CROSS_ORIGIN_URI = "http://test1.example.com/tests/docshell/test/mochitest/ping.html";
+
+      function asyncClick(counts) {
+        let frame = document.createElement('iframe');
+        frame.addEventListener(
+          'load', () => frame.contentWindow.postMessage({command: "start"}, "*"),
+          { once:true });
+        frame.src = "clicker.html";
+
+        addEventListener('message', ({source}) => {
+          if (source === frame.contentWindow) {
+            counts.click++;
+            synthesizeMouse(document.getElementById('button'), 5, 5, {});
+          }
+        }, { once: true });
+
+        document.body.appendChild(frame);
+        return stop;
+      }
+
+      function click(button) {
+        synthesizeMouse(button, 5, 5, {});
+      }
+
+      add_task(async function runTest() {
+        let frame = document.getElementById('targetFrame');
+        await new Promise(resolve => {
+          addEventListener('message', resolve, {once: true});
+          frame.src = CROSS_ORIGIN_URI;
+        });
+
+        let form = document.getElementById('form');
+        let button = document.getElementById('button');
+
+        let token = document.getElementById('token');
+        token.value = "first";
+
+        await new Promise((resolve, reject) => {
+          let counts = { click: 0, submit: 0 };
+          form.addEventListener('submit', () => counts.submit++);
+          asyncClick(counts);
+          form.requestSubmit(button);
+          token.value = "bad";
+          let steps = {
+            good: {
+              entered: false,
+              next: () => { steps.good.entered = true; resolve(); },
+              assertion: () => {
+                ok(steps.first.entered && !steps.bad.entered, "good comes after first, but not bad")
+              }
+            },
+            first: {
+              entered: false,
+              next: () => { steps.first.entered = true; token.value = "good"; click(button); },
+              assertion: () => {
+                ok(!steps.good.entered && !steps.bad.entered, "first message is first")
+                is(counts.click, 1, "clicked");
+                is(counts.submit, 2, "did submit");
+              }
+            },
+            bad: {
+              entered: false,
+              next: () => { reject(); },
+              assertion: () => ok(false, "we got a bad message")
+            }
+          };
+          addEventListener('message', ({source, data}) => {
+            if (source !== frame.contentWindow) {
+              return;
+            }
+
+            let step = steps[data] || reject;
+            step.assertion();
+            step.next();
+          })
+        });
+      });
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/test_forceinheritprincipal_overrule_owner.html b/docshell/test/mochitest/test_forceinheritprincipal_overrule_owner.html
new file mode 100644
index 0000000000..70d610a677
--- /dev/null
+++ b/docshell/test/mochitest/test_forceinheritprincipal_overrule_owner.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<script type="text/javascript">
+
+var channel = SpecialPowers.wrap(window).docShell.currentDocumentChannel;
+var loadInfo = channel.loadInfo;
+
+// 1) perform some sanity checks
+var triggeringPrincipal = channel.loadInfo.triggeringPrincipal.asciiSpec;
+var loadingPrincipal = channel.loadInfo.loadingPrincipal.asciiSpec;
+var principalToInherit = channel.loadInfo.principalToInherit.asciiSpec;
+
+ok(triggeringPrincipal.startsWith("http://mochi.test:8888/")
+    || triggeringPrincipal.startsWith("http://mochi.xorigin-test:8888/"),
+   "initial triggeringPrincipal correct");
+ok(loadingPrincipal.startsWith("http://mochi.test:8888/")
+    || loadingPrincipal.startsWith("http://mochi.xorigin-test:8888/"),
+   "initial loadingPrincipal correct");
+ok(principalToInherit.startsWith("http://mochi.test:8888/")
+    || principalToInherit.startsWith("http://mochi.xorigin-test:8888/"),
+   "initial principalToInherit correct");
+
+// reset principals on the loadinfo
+loadInfo.resetPrincipalToInheritToNullPrincipal();
+
+// 2) verify loadInfo contains the correct principals
+triggeringPrincipal = channel.loadInfo.triggeringPrincipal.asciiSpec;
+loadingPrincipal = channel.loadInfo.loadingPrincipal.asciiSpec;
+principalToInherit = channel.loadInfo.principalToInherit;
+
+ok(triggeringPrincipal.startsWith("http://mochi.test:8888/")
+    || triggeringPrincipal.startsWith("http://mochi.xorigin-test:8888/"),
+   "triggeringPrincipal after resetting correct");
+ok(loadingPrincipal.startsWith("http://mochi.test:8888/")
+    || loadingPrincipal.startsWith("http://mochi.xorigin-test:8888/"),
+   "loadingPrincipal after resetting correct");
+ok(principalToInherit.isNullPrincipal
+    || principalToInherit.startsWith("http://mochi.xorigin-test:8888/"),
+   "principalToInherit after resetting correct");
+
+// 3) verify that getChannelResultPrincipal returns right principal
+var resultPrincipal = SpecialPowers.Services.scriptSecurityManager
+                                   .getChannelResultPrincipal(channel);
+
+ok(resultPrincipal.isNullPrincipal,
+   "resultPrincipal after resetting correct");
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_form_restoration.html b/docshell/test/mochitest/test_form_restoration.html
new file mode 100644
index 0000000000..b929236770
--- /dev/null
+++ b/docshell/test/mochitest/test_form_restoration.html
@@ -0,0 +1,77 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test form restoration for no-store pages</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    function waitForMessage(aBroadcastChannel) {
+      return new Promise(resolve => {
+        aBroadcastChannel.addEventListener("message", ({ data }) => {
+          resolve(data);
+        }, { once: true });
+      });
+    }
+
+    function postMessageAndWait(aBroadcastChannel, aMsg) {
+      let promise = waitForMessage(aBroadcastChannel);
+      aBroadcastChannel.postMessage(aMsg);
+      return promise;
+    }
+
+    async function startTest(aTestFun) {
+      let bc = new BroadcastChannel("form_restoration");
+
+      let promise = waitForMessage(bc);
+      window.open("file_form_restoration_no_store.html", "", "noopener");
+      await promise;
+
+      // test steps
+      await aTestFun(bc);
+
+      // close broadcast channel and window
+      bc.postMessage("close");
+      bc.close();
+    }
+
+    /* Test for bug1740517 */
+    add_task(async function history_back() {
+      await startTest(async (aBroadcastChannel) => {
+        // update form data
+        aBroadcastChannel.postMessage("enter_data");
+
+        // navigate
+        await postMessageAndWait(aBroadcastChannel, "navigate");
+
+        // history back
+        let { persisted, formData } = await postMessageAndWait(aBroadcastChannel, "back");
+
+        // check form data
+        ok(!persisted, "Page with a no-store header shouldn't be bfcached.");
+        is(formData, "initial", "We shouldn't restore form data when going back to a page with a no-store header.");
+      });
+    });
+
+    /* Test for bug1752250 */
+    add_task(async function location_reload() {
+      await startTest(async (aBroadcastChannel) => {
+        // update form data
+        aBroadcastChannel.postMessage("enter_data");
+
+        // reload
+        let { persisted, formData } = await postMessageAndWait(aBroadcastChannel, "reload");
+
+        // check form data
+        ok(!persisted, "Page with a no-store header shouldn't be bfcached.");
+        is(formData, "initial", "We shouldn't restore form data when reload a page with a no-store header.");
+      });
+    });
+  </script>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_framedhistoryframes.html b/docshell/test/mochitest/test_framedhistoryframes.html
new file mode 100644
index 0000000000..f90028af0a
--- /dev/null
+++ b/docshell/test/mochitest/test_framedhistoryframes.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=602256
+-->
+<head>
+  <title>Test for Bug 602256</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=602256">Mozilla Bug 602256</a>
+<p id="display"></p>
+<div id="content">
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 602256 */
+
+SimpleTest.waitForExplicitFinish();
+var win = window.open("file_framedhistoryframes.html");
+
+function done() {
+  win.close();
+  SimpleTest.finish();
+}
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_iframe_srcdoc_to_remote.html b/docshell/test/mochitest/test_iframe_srcdoc_to_remote.html
new file mode 100644
index 0000000000..05e0934d50
--- /dev/null
+++ b/docshell/test/mochitest/test_iframe_srcdoc_to_remote.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<head>
+  <meta charset="utf-8">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body onload="test()">
+    <script>
+        /*
+         Test to verify that when we change an OOP iframe to one that has a
+         srcdoc it loads in the correct process, which in this case is this
+         test document.
+         */
+        SimpleTest.waitForExplicitFinish();
+        async function test() {
+            // Create an OOP iframe
+            let frame = document.createElement("iframe");
+            await new Promise(r => {
+                frame.onload = r;
+                document.body.appendChild(frame);
+                // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+                frame.contentWindow.location = "http://example.net/tests/docshell/test/dummy_page.html";
+            });
+            if (SpecialPowers.useRemoteSubframes) {
+              ok(SpecialPowers.Cu.isRemoteProxy(frame.contentWindow), "should be a remote frame");
+            }
+
+            // Remove the attribute so we can set a srcdoc attribute on it
+            frame.removeAttribute("src");
+
+            // Set a srcdoc attribute on this iframe and wait for the load
+            await new Promise(r => {
+                frame.onload = r;
+                frame.setAttribute("srcdoc", '<html><body>body of the srcdoc frame</body></html>');
+            });
+
+            // We should be in the same process as this test document
+            ok(!SpecialPowers.Cu.isRemoteProxy(frame.contentWindow), "should NOT be a remote frame");
+            SimpleTest.finish();
+        }
+    </script>
+</body>
+
diff --git a/docshell/test/mochitest/test_javascript_sandboxed_popup.html b/docshell/test/mochitest/test_javascript_sandboxed_popup.html
new file mode 100644
index 0000000000..edce93c26f
--- /dev/null
+++ b/docshell/test/mochitest/test_javascript_sandboxed_popup.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<head>
+<meta charset="utf-8">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+<iframe srcdoc="<a href='javascript:opener.parent.ok(false, `The JS ran!`)' target=_blank rel=opener>click</a>"
+  sandbox="allow-popups allow-same-origin"></iframe>
+
+<script>
+add_task(async function() {
+  let promise = new Promise(resolve =>{
+    SpecialPowers.addObserver(function obs(subject) {
+      is(subject.opener, window[0],
+         "blocked javascript URI should have been targeting the pop-up document");
+      subject.close();
+      SpecialPowers.removeObserver(obs, "javascript-uri-blocked-by-sandbox");
+      resolve();
+    }, "javascript-uri-blocked-by-sandbox");
+  });
+  document.querySelector("iframe").contentDocument.querySelector("a").click();
+  await promise;
+});
+</script>
+</body>
diff --git a/docshell/test/mochitest/test_load_during_reload.html b/docshell/test/mochitest/test_load_during_reload.html
new file mode 100644
index 0000000000..88856b0100
--- /dev/null
+++ b/docshell/test/mochitest/test_load_during_reload.html
@@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test loading a new page after calling reload()</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+
+    function promiseForLoad() {
+      return new Promise(resolve => {
+        addEventListener("message", resolve, { once: true });
+      });
+    }
+
+    add_task(async function runTest() {
+      let win = window.open("file_load_during_reload.html");
+      await promiseForLoad();
+
+      win.location.reload();
+      win.location.href = "file_load_during_reload.html?nextpage";
+      await promiseForLoad();
+
+      ok(win.location.href.includes("nextpage"), "Should have loaded the next page.");
+      win.close();
+    });
+
+    add_task(async function runTest2() {
+      let win = window.open("file_load_during_reload.html");
+      await promiseForLoad();
+
+      win.history.replaceState("", "", "?1");
+      win.location.reload();
+      win.history.pushState("", "", "?2");
+      win.location.reload();
+      await promiseForLoad();
+
+      ok(win.location.href.includes("2"), "Should have loaded the second page.");
+      win.close();
+    });
+
+  </script>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_navigate_after_pagehide.html b/docshell/test/mochitest/test_navigate_after_pagehide.html
new file mode 100644
index 0000000000..17d58d6e62
--- /dev/null
+++ b/docshell/test/mochitest/test_navigate_after_pagehide.html
@@ -0,0 +1,34 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Test for navigation attempts by scripts in inactive inner window</title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  </head>
+<body>
+<iframe src="dummy_page.html" id="iframe"></iframe>
+
+<script>
+"use strict";
+
+add_task(async function() {
+  let iframe = document.getElementById("iframe");
+
+  let navigate = iframe.contentWindow.eval(`(function() {
+    location.href = "/";
+  })`);
+
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  iframe.src = "http://example.com/";
+  await new Promise(resolve =>
+    iframe.addEventListener("load", resolve, { once: true })
+  );
+
+  // This should do nothing. But, importantly, it should especially not crash.
+  navigate();
+
+  ok(true, "We didn't crash");
+});
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_pushState_after_document_open.html b/docshell/test/mochitest/test_pushState_after_document_open.html
new file mode 100644
index 0000000000..b81951b7ae
--- /dev/null
+++ b/docshell/test/mochitest/test_pushState_after_document_open.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=957479
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 957479</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 957479 */
+  SimpleTest.waitForExplicitFinish();
+  // Child needs to invoke us, otherwise our onload will fire before the child
+  // has done the write/close bit.
+  onmessage = function doTest() {
+    is(frames[0].location.pathname, "/tests/docshell/test/mochitest/file_pushState_after_document_open.html",
+       "Should have the right path here");
+    is(frames[0].location.hash, "", "Should have the right hash here");
+    frames[0].history.pushState({}, "", frames[0].document.URL + "#foopy");
+    is(frames[0].location.pathname, "/tests/docshell/test/mochitest/file_pushState_after_document_open.html",
+       "Pathname should not have changed");
+    is(frames[0].location.hash, "#foopy", "Hash should have changed");
+    SimpleTest.finish();
+  };
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=957479">Mozilla Bug 957479</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+<iframe src="file_pushState_after_document_open.html"></iframe>
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_redirect_history.html b/docshell/test/mochitest/test_redirect_history.html
new file mode 100644
index 0000000000..a67c808405
--- /dev/null
+++ b/docshell/test/mochitest/test_redirect_history.html
@@ -0,0 +1,58 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Test for redirect from POST</title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <body>
+    <script>
+      "use strict";
+
+      info("Starting tests");
+
+      let tests = new Map([
+        ["sameorigin", window.location.origin],
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        ["crossorigin", "http://test1.example.com"],
+      ]);
+      for (let [kind, origin] of tests) {
+        add_task(async function runTest() {
+          info(`Submitting to ${origin}`);
+
+          let win;
+          await new Promise(resolve => {
+            addEventListener("message", resolve, { once: true });
+            info("Loading file_redirect_history.html");
+            win = window.open("file_redirect_history.html");
+          });
+          info("Done loading file_redirect_history.html");
+
+          let length = win.history.length;
+          let loc = win.location.toString();
+
+          await new Promise(resolve => {
+            addEventListener("message", resolve, { once: true });
+            info("Posting");
+            win.postMessage(`${origin}/tests/docshell/test/mochitest/form_submit_redirect.sjs?redirectTo=${loc}`, "*")
+          });
+          info("Done posting\n");
+          is(win.history.length, length, `Test ${kind}: history length should not change.`);
+          info(`Length=${win.history.length}`);
+          is(win.location.toString(), loc, `Test ${kind}: location should not change.`);
+
+          await new Promise(resolve => {
+            addEventListener("message", resolve, { once: true });
+            info("Reloading");
+            win.location.reload();
+          });
+          info("Done reloading\n");
+          is(win.location.toString(), loc, `Test ${kind}: location should not change after reload.`);
+
+          win.close();
+        });
+      }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/mochitest/test_triggeringprincipal_location_seturi.html b/docshell/test/mochitest/test_triggeringprincipal_location_seturi.html
new file mode 100644
index 0000000000..92e20b03ea
--- /dev/null
+++ b/docshell/test/mochitest/test_triggeringprincipal_location_seturi.html
@@ -0,0 +1,105 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+const SAME_ORIGIN_URI = "http://mochi.test:8888/tests/docshell/test/dummy_page.html";
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+const CROSS_ORIGIN_URI = "http://example.com/tests/docshell/test/dummy_page.html";
+const NUMBER_OF_TESTS = 3;
+let testCounter = 0;
+
+function checkFinish() {
+  testCounter++;
+  if (testCounter < NUMBER_OF_TESTS) {
+    return;
+  }
+  SimpleTest.finish();
+}
+
+// ---- test 1 ----
+
+let myFrame1 = document.createElement("iframe");
+myFrame1.src = SAME_ORIGIN_URI;
+myFrame1.addEventListener("load", checkLoadFrame1);
+document.documentElement.appendChild(myFrame1);
+
+function checkLoadFrame1() {
+  myFrame1.removeEventListener("load", checkLoadFrame1);
+  // window.location.href is no longer cross-origin accessible in gecko.
+  is(SpecialPowers.wrap(myFrame1.contentWindow).location.href, SAME_ORIGIN_URI,
+    "initial same origin dummy loaded into frame1");
+
+  SpecialPowers.wrap(myFrame1.contentWindow).location.hash = "#bar";
+  is(SpecialPowers.wrap(myFrame1.contentWindow).location.href, SAME_ORIGIN_URI + "#bar",
+    "initial same origin dummy#bar loaded into iframe1");
+
+  myFrame1.addEventListener("load", checkNavFrame1);
+  myFrame1.src = CROSS_ORIGIN_URI;
+}
+
+async function checkNavFrame1() {
+  myFrame1.removeEventListener("load", checkNavFrame1);
+  is(await SpecialPowers.spawn(myFrame1, [], () => this.content.location.href),
+     CROSS_ORIGIN_URI,
+    "cross origin dummy loaded into frame1");
+
+  myFrame1.addEventListener("load", checkBackNavFrame1);
+  myFrame1.src = SAME_ORIGIN_URI + "#bar";
+}
+
+async function checkBackNavFrame1() {
+  myFrame1.removeEventListener("load", checkBackNavFrame1);
+  is(await SpecialPowers.spawn(myFrame1, [], () => this.content.location.href),
+     SAME_ORIGIN_URI + "#bar",
+    "navagiating back to same origin dummy for frame1");
+  checkFinish();
+}
+
+// ---- test 2 ----
+
+let myFrame2 = document.createElement("iframe");
+myFrame2.src = "about:blank";
+myFrame2.addEventListener("load", checkLoadFrame2);
+document.documentElement.appendChild(myFrame2);
+
+function checkLoadFrame2() {
+  myFrame2.removeEventListener("load", checkLoadFrame2);
+  is(SpecialPowers.wrap(myFrame2.contentWindow).location.href, "about:blank",
+    "initial about:blank frame loaded");
+
+  myFrame2.contentWindow.location.hash = "#foo";
+  is(SpecialPowers.wrap(myFrame2.contentWindow).location.href, "about:blank#foo",
+      "about:blank#foo frame loaded");
+
+  myFrame2.addEventListener("load", checkHistoryFrame2);
+  myFrame2.src = "about:blank";
+}
+
+function checkHistoryFrame2() {
+  myFrame2.removeEventListener("load", checkHistoryFrame2);
+  is(SpecialPowers.wrap(myFrame2.contentWindow).location.href, "about:blank",
+    "about:blank frame loaded again");
+  checkFinish();
+}
+
+// ---- test 3 ----
+
+let myFrame3 = document.createElement("frame");
+document.documentElement.appendChild(myFrame3);
+myFrame3.contentWindow.location.hash = "#foo";
+
+is(myFrame3.contentWindow.location.href, "about:blank#foo",
+   "created history entry with about:blank#foo");
+checkFinish();
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/mochitest/test_windowedhistoryframes.html b/docshell/test/mochitest/test_windowedhistoryframes.html
new file mode 100644
index 0000000000..a874da098c
--- /dev/null
+++ b/docshell/test/mochitest/test_windowedhistoryframes.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=602256
+-->
+<head>
+  <title>Test for Bug 602256</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=602256">Mozilla Bug 602256</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 602256 */
+
+SimpleTest.waitForExplicitFinish();
+
+function done() {
+  subWin.close();
+  SimpleTest.finish();
+}
+
+var subWin = window.open("historyframes.html", "_blank");
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/mochitest/url1_historyframe.html b/docshell/test/mochitest/url1_historyframe.html
new file mode 100644
index 0000000000..b86af4b3fa
--- /dev/null
+++ b/docshell/test/mochitest/url1_historyframe.html
@@ -0,0 +1 @@
+<p id='text'>Test1</p>
diff --git a/docshell/test/mochitest/url2_historyframe.html b/docshell/test/mochitest/url2_historyframe.html
new file mode 100644
index 0000000000..24374d1a5b
--- /dev/null
+++ b/docshell/test/mochitest/url2_historyframe.html
@@ -0,0 +1 @@
+<p id='text'>Test2</p>
-- 
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