1354959 - Tab bar rendering glitch

Status: RESOLVED WORKSFORME

(Toolkit :: Themes, defect)

Description

[COOLPRASH]

Attachment: 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.

Comment 1

[Loic]

Which them are you using?
Does it appear with the default theme?

Comment 2

[COOLPRASH]

(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.

Comment 3

[Loic]

Theme: https://addons.mozilla.org/en-US/firefox/addon/nissan-gtr-black/

Comment 4

[Loic]

Attachment: 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?

Comment 5

[Ciprian Muresan [:cmuresan], Ecosystem QA]

Attachment: 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.

Comment 6

[Ciprian Muresan [:cmuresan], Ecosystem QA]

> 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. :)

Comment 7

[COOLPRASH]

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.