With firefox sidebar opened on left, glance view control botton floats over the sidebar

[sporocyst]

Captchas

• I have read the instructions.
• 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?

STR:
1 Open firefox sidebar and locate it on left
2 Navigate to any tab and open a glance view

Expected result
The glance view control button is confined within the webpage area that opens the glance

Actual result
As the title and image shows

Version

1.11.2t

What platform are you seeing the problem on?

Windows - x64

What component is this issue related to?

Glance

Relevant log output if applicable

[Tanay-Kar]

Reproduceable on linux