This bug is for crash report bp-707da701-8211-4a46-8912-cf4590200714.

Top 5 frames of crashing thread:

0 xul.dll mozilla::extensions::DocInfo::DocInfo toolkit/components/extensions/WebExtensionPolicy.cpp:764
1 xul.dll mozilla::extensions::MozDocumentMatcher::MatchesWindow const toolkit/components/extensions/WebExtensionContentScript.h:118
2 xul.dll mozilla::dom::MozDocumentMatcher_Binding::matchesWindow dom/bindings/WebExtensionContentScriptBinding.cpp:1278
3 xul.dll mozilla::dom::binding_detail::GenericMethod<mozilla::dom::binding_detail::NormalThisPolicy, mozilla::dom::binding_detail::ThrowExceptions> dom/bindings/BindingUtils.cpp:3219
4  @0x1b5c3621589 

Affected versions

• 80.0a1 (2020-07-13)

Affected platforms

• Windows 10x64

Steps to reproduce

1. Launch FF Nightly.
2. Go to gmail.com
3. Go to the Gmail account selector drop-down and choose another account.

Expected result

• A different account is chosen successfully and there are not stability issues.

Actual result

• Upon selecting a different Gmail account, the tab will crash during the load up of the page.

Additional notes

• Upon reproducing the issue I was having 3 Gmail accounts signed in the browser.
• about:support raw data: https://drive.google.com/file/d/1rahuziTHAPnAhT46CEfjd0vYMO3dyC6b/view?usp=sharing
• Seeing as how this has a 100% repro rate and it affects an important email service provider, I would consider this an S1 severity issue.

I get this reliably on Treeherder (latest Nightly, macOS, Fission enabled). Weird because I didn't get it at first but suddenly it started.

Bisected:

 6:30.85 INFO: Last good revision: 9469156609ae5ccd4147308e617106c5baeaad2b
 6:30.85 INFO: First bad revision: 328b97bc228edf3880cfd94fdf20b5c6bc5bd85a
 6:30.85 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=9469156609ae5ccd4147308e617106c5baeaad2b&tochange=328b97bc228edf3880cfd94fdf20b5c6bc5bd85a

=> bug 1587541

Fixed by backout of bug 1587541.

This crashing on outlook.com if you have ublock enabled.

see https://crash-stats.mozilla.org/report/index/fda12fea-6606-44c5-9978-6a40a0200714
https://crash-stats.mozilla.org/report/index/bp-ad95cb7c-24ec-452d-b391-a48010200714
https://crash-stats.mozilla.org/report/index/bp-cbe0b902-8860-4665-9a70-796a00200714

Seeing as it's hitting one of the largest addons and some well known sites is there a new Nightly being spun up?

Nightly build 20200714083249 is now live with this backout included.