1503507 - [Win 7][Dark Theme] Residual blue pixels near zoom indicator on max zoom out

Status: NEW

(Core :: Layout: Form Controls, defect, P4)

Description

[Cristian Fogel [:cfogel]]

Attachment: DarkZoom_DOT.png

[Affected versions]:
- 60,3ESR, 63.0.1, 64.0b4, 64.0b5, 65.0a1 (2018-10-29);

[Affected platforms]:
- Windows 7 (both x64, x86);

[Notes]:
- Windows 7 Basic theme needs to be applied;

[Steps to reproduce]:
1. Launch Firefox;
2. Change to Dark Theme;
3. Press and hold CTRL and - on the keyboard to zoom out to the max value(30%);
4. Observe the zoom value inside the awesomebar;

[Expected result]:
- zoom indicator is properly displayed;

[Actual result]:
- blue pixels appear in front of the zoom value;

[Regression range]:
- mozregreggsion couldn't bisect further;
- last good: 2017-05-20;
pushlogURL:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8d60d0f825110cfb646ac31dc16dc011708bcf34&tochange=5b74bbf20e803e299790d266fc6ebf5d53b7a1b7

- first bad: 2017-05-21;
pushlogURL:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8e98dab5054dd093a37ba20c62cf0523e484cfbd&tochange=5b74bbf20e803e299790d266fc6ebf5d53b7a1b7

[Additional notes]:
- attached screenshot with the issue;
- limited to Win7, was not able to reproducible on Win10, Win8, macOS(10.11), Ubuntu16.04;