Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# MacOS notarization
+
+With the introduction of macOS 10.15 “Catalina” Apple introduced
+[new notarization requirements] that all software must be signed
+and notarized centrally.
+
+Whilst the geckodriver binary is technically both signed and notarized, the
+actual validation can only be performed by MacOS if the machine that starts
+the geckodriver binary for the very first time is online. Offline validation
+would require shipping geckodriver as a DMG/PKG. You can track the relevant
+progress in [bug 1783943].
+
+Note: geckodriver releases between 0.26.0 and 0.31.0 don't have the
+notarization applied and always require the manual steps below to
+bypass the notarization requirement of the binary during the very first start.
+
+[new notarization requirements]: https://developer.apple.com/news/?id=04102019a
+[bug 1783943]: https://bugzilla.mozilla.org/show_bug.cgi?id=1783943
+
+## Offline mode
+
+There are some mitigating circumstances:
+
+* Verification problems only occur when other notarized programs,
+  such as a web browser, downloads the software from the internet.
+
+* Arbitrary software downloaded through other means, such as
+  curl(1) is _not_ affected by this change.
+
+In other words, if your method for fetching geckodriver on macOS
+is through the GitHub web UI using a web browser, the program will
+not be able to run unless you manually disable the quarantine check
+(explained below).  If downloading geckodriver via other means
+than a macOS notarized program, you should not be affected.
+
+To bypass the notarization requirement on macOS if you have downloaded
+the geckodriver .tar.gz via a web browser, you can run the following
+command in a terminal:
+
+  % xattr -r -d com.apple.quarantine geckodriver
+
+A problem with notarization will manifest itself through a security
+dialogue appearing, explaining that the source of the program is
+not trusted.