Created attachment 8858283 [details] 2 pinned icons of FF Nightly User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170413030227 Steps to reproduce: Conditions - FF nightly icon was pinned to task-bar. Platform - Win 10 X 64 1) click on pinned icon of FF nightly after updating the build. 2) FF nightly gets opened in separate icon in the task-bar other than the pinned one. if pinned icon is clicked, it will open a new window. ( Refer screenshot on - http://imgur.com/a/olGGY ) 3) Next day, when i gain update the build, same case as in step 2 happened but this time pinned icon seems like a notepad icon.(Refer screenshot on - http://imgur.com/a/UVXLR ) Actual results: As mentioned in step 3 of S.T.R NOTE - does not happen every time but noticed several time on same platform. Build ID : previous to 20170413030227 Expected results: Pinned icon of FF-Nightly should remain same and merged with every new update of FF Nightly build.
Severity: normal → major
OS: Unspecified → Windows 10
Hardware: Unspecified → x86_64
Confirmed with Madhuri on IRC that this issue happened only with Nightly, _after_ updating Windows 10 to the latest build (1703, 10.0.15063.138). Release QA is currently looking into it.
It's a known bug which appears after updates, Firefox is not the only application affected (I think the bug is in here since Win 7). Read this comment for more technical details: https://bugzilla.mozilla.org/show_bug.cgi?id=1194410#c10
Status: UNCONFIRMED → RESOLVED
Last Resolved: 11 months ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1194410
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