1506625 - [Win] Welcome Page is not properly displayed when using High Contrast Theme (on Firefox 64 Beta builds)

Status: NEW

(Firefox :: Theme, defect, P3)

Description

[Camelia Badau [:cbadau], Desktop Test Engineering]

Attachment: issueWelcomepage.png

[Affected versions]:
- Firefox 64 Beta 8 (buildID: 20181108141956)

[Affected platforms]:
- Windows 7 x64
- Windows 10 x64

[Steps to reproduce]:
1. Set High Contrast White/Black Theme (Right-click -> Personalize -> Colors -> High Contrast Settings).
2. Launch Firefox with a new profile.
3. Observe the Welcome Page. 

[Expected result]:
- Welcome page is properly displayed. 

[Actual result]:
- Welcome Page is NOT properly displayed. Please see attachment "issueWelcomepage.png"

[Regression range]:
- Is not a regression since the issue is reproducible on Firefox 64 Beta 3, but is NOT reproducible on Firefox 63 Beta 14 build. 

[Additional notes]:
- This issue is reproducible ONLY on Firefox 64 Beta builds. Here, after selecting "Skip this step" option, a page with Add-ons, Private Browsing, Screenshots description is displayed. 
- On Firefox RC, Nightly and previous Firefox Beta (e.g: 63 Beta 5) builds, the issue is NOT reproducible: after selecting "Skip this step" option, a new tab is displayed.