Arror in site information menu is overlapping at slightly off position

[ameyparab3]

Sanity checks (must complete)

• [ yes] I have read and followed the installation instructions in the README
• [ yes] I have not modified the userChrome.css file
• [ yes] I have tested the latest release for my Firefox version, or commit on master/beta branch (beta is for Firefox Beta only)

Describe the bug
When you click on the lock icon in address bar to see the site information, the arrow icon in the menu is slightly to the right overlapping the arrow below (view screenshot)

To Reproduce
Steps to reproduce the behavior:

1. Click on 'Lock icon in address bar'
2. See issue

Screenshots

System info

• OS: [e.g. Windows 10]
• Firefox version: [e.g. 88.0.1]

Additional context
None