>>105577748
No problem.
The devs of Internet Connection Monitor said in their site that a Firefox version will be released, but it's not done yet.
This is the closest that I could find: https://addons.mozilla.org/en-US/firefox/addon/internet-connection-monitor/

If you have more customization questions, let me know here's some examples from about:config advanced settings page:
- disable Pocket native extension: set extensions.pocket.enabled to false
- change UI to compact mode: set browser.uidensity to 1 and browser.compactmode.show to true
- remove "Inspect accessibility Properties" from context menu: devtools.accessibility.enabled to false
- remove Screenshot native extension: set extensions.screenshots.disabled to true
- remove AI chatbot from the sidebar integration: set browser.ml.chat.enabled to false

And to enable HEVC hardware decoding, download the extension "HEVC Video Extensions from Device Manufacturer" from Microsoft Store (a link from about:support page in Firefox, in the "Media" section, will redirect you there)