Browser extension doesn't work on certain pages on GitHub

Created by: taras-yemets

• Sourcegraph version: browser extension v22.4.7.1712
• Platform information: Chrome v101.0.4951.54, Firefox v99.0

Sourcegraph browser extension doesn't work on certain files.

Steps to reproduce:

1. Open react-spectrum/tooltip/src/TooltipTrigger.tsx and pay attention to the browser extensions features (code-intel, command palette, view repo/file on Sourcegraph) - they are not working.
2. Open another file and check the same features - they are working.

Expected behavior:

The browser extension works on all file views.

Actual behavior:

The browser extension doesn't work on certain file views.