Created attachment 8856303 [details] ActiveTabGlitch User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0 Build ID: 20170323105023 Steps to reproduce: Open any website on any tab. A darker theme can make this bug more visible. Actual results: On the active/selected tab, the rendering of the tab bar is glitchy. The glitch is graphical as one can see a rectangular bar around the page title (tab bar). This began since Firefox 52. Expected results: The active tab bar should not produce that glitch, and be similar to the non-active tabs which do not have that glitch when hovered over by cursor. Pre Firefox 52 versions did not produce this glitch. You can very clearly see this using a dark theme as the default theme highlights it very slightly.
Which them are you using? Does it appear with the default theme?
(In reply to Loic from comment #1) > Which them are you using? > Does it appear with the default theme? Im using a dark theme to make this glitch more visible. Theme is named "Nissan GTR black", but any dark theme makes it visible. I noticed this on the default theme at first but its not easy to notice it with a light theme.
Created attachment 8857575 [details] FF52-dark-theme.jpg I can't reproduce it with FF52 32/64b on Win 7. Ciprian, are you able to reproduce the issue on Windows 10 with the theme I provided in my previous comment?
Created attachment 8857777 [details] screenshot_tab_bar.png User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID 20170412030252 I wasn't able to reproduce the issue on the Firefox Release (52.0.2, Build ID 20170323105023) or on the latest Nightly 55.0a1. Coolprash, could you please retest the issue using a clean new profile, maybe even safe mode to eliminate custom settings as a possible cause.
Flags: needinfo?(ciprian.muresan) → needinfo?(coolprash_07)
> Coolprash, could you please retest the issue using a clean new profile, > maybe even safe mode to eliminate custom settings as a possible cause? That was supposed to be a question. :)
Thank you for your time in looking into this matter. I was busy over the weekend configuring Windows 10 Creators update on my PC. The problem no longer exists after a clean install of the OS and FF52. I believe this might have been a glitch with my graphics driver. Once again thank you for the quick responses and action on my bug report. This bug can be deleted. If I need to do this from my end, let me know how. Regards.
Status: UNCONFIRMED → RESOLVED
Last Resolved: a year ago
Resolution: --- → WORKSFORME
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