STR:

1. Click in the address bar and alter the contents so the Go button appears on the far right.
2. Switch to a different tab and then return.

Expected:
Go button remains visible in original tab with modified address.

Actual:
Go button is not visible, despite contents being modified, until it is re-modified.

Regression window:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ea7b55d65d76214f97aaae502d65cb26fc6f5659&tochange=d53ba311ca2f0c3d81d4a5e88a7449c18ec5e4b6

Regressed by Bug 1396205.

:dao, since you are the author of the regressor, bug 1396205, could you take a look?

For more information, please visit BugBot documentation.

Backed out for causing failures at browser_windowopen.js

Backout link: https://hg.mozilla.org/integration/autoland/rev/573b87117fd3efdb12ffb05692f97323c07a9900

Push with failures: https://treeherder.mozilla.org/jobs?repo=autoland&selectedTaskRun=Z9BizqHnQAam7eB2GcaXHQ.0&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&revision=a72a5e849a5d8d0f886985b7f83b6b861a14f066

Failure log: https://treeherder.mozilla.org/logviewer?job_id=421088654&repo=autoland&lineNumber=6461

https://hg.mozilla.org/mozilla-central/rev/d9d558f9b89b

Reproduced the issue on 115.0.1, then proceeded to verify it as fixed on Windows 10, Mac 13, Ubuntu 22.04 with Firefox 119.0a1 (2023-08-30), 118.0b2, 117.0, 116.0.3