Affected versions

• Fx87.0b6 - DevEd and beta
• Fx86.0 - DevEd and beta

Affected platforms

• Windows 10
• macOS 10.15
• Ubuntu 18.04

Steps to reproduce

1. Launch an older version of Firefox, but NOT older than 86.
2. Open the hamburger menu and click the About Firefox option.
3. Wait for the download to complete.
4. Observe the restart button.

Expected result

• The button is correctly position in the menu window.

Actual result

• The button slightly overlaps the branding text.

Regression range

• First bad: Fx86.0b1
• Last good: Fx85.0b9
• I'll come back with a link to a regression range, but something appears to have broken in the first Fx86 build.

Additional notes

• The issue occurs on beta as well, but not in such an obvious manner. The button is displayed directly beneath the brand text, not being centered in the available space.
• The issue does not occur on nightly, as the download button si displayed in another section.

This is a duplicate of bug 1697069.