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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js')
-rw-r--r-- | browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js b/browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js new file mode 100644 index 0000000000..2d328de108 --- /dev/null +++ b/browser/extensions/webcompat/injections/js/bug1842437-www.youtube.com-performance-now-precision.js @@ -0,0 +1,39 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +/** + * Bug 1842437 - When attempting to go back on youtube.com, the content remains the same + * + * If consecutive session history entries had history.state.entryTime set to same value, + * back button doesn't work as expected. The entryTime value is coming from performance.now() + * and modifying its return value slightly to make sure two close consecutive calls don't + * get the same result helped with resolving the issue. + */ + +/* globals exportFunction */ + +console.info( + "performance.now precision has been modified for compatibility reasons. See https://bugzilla.mozilla.org/show_bug.cgi?id=1756970 for details." +); + +const origPerf = performance.wrappedJSObject; +const origNow = origPerf.now; + +let counter = 0; +let previousVal = 0; + +Object.defineProperty(window.performance.wrappedJSObject, "now", { + value: exportFunction(function () { + let originalVal = origNow.call(origPerf); + if (originalVal === previousVal) { + originalVal += 0.00000003 * ++counter; + } else { + previousVal = originalVal; + counter = 0; + } + return originalVal; + }, window), +}); |