Add Extension, while in Compact Mode (and Only Sidebar layout) makes the Install pop-up to dissapear instantly.

Preliminary Checks

• I have read and understood the important section above.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.
• I have checked that this issue cannot be reproduced on Mozilla Firefox.
• I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

Impossible to add extension while in compact mode (and Only Sidebar layout). Using compact mode, in conjunction with Only Sidebar layout, makes the add extensions pop-up to appear and disappear instantly, since its seems to be aligned with the URL Bar/Tab, but there isn't one visible.

Expected behavior

Pop-up is supposed stay open until user decide to Add or Cancel.

Actual behavior

Extension Pop-up installation vanish instantly after clicking "Add to Firefox" on the Extension page.

Steps to reproduce

1. Set Zen browser layout to Only Sidebar
2. Enable compact mode, to hide everything around
3. Click "Add to Firefox" button to install a new extension.

PS: While in Only Sidebar layout is selected, getting out of Compact mode fixes it. Using compact mode in either Sidebar and Top Toolbar or Collapsed Sidebar work as supposed to, since the URL Bar(or tab) is visible at all times.

Screenshots and videos

Version

1.22.2b (Firefox 156.0)

What platform are you seeing the problem on?

Windows - x64

What component is this issue related to?

URL Bar

Relevant log output if applicable