They don't support Linux applications, they don't support the main Linux browser. They don't want you to use Linux

For self-hosted https://bitmagnet.io/ is a very good and new alternative, has DHT crawler, and has an active development

It works for me, I have KDE version. I have AUR apps, SNAP (VSC works better in snap than flatpak), official repo apps. I have not had any errors in the 6 months I have been using it.

117 deprecate appearance: -moz-win-borderless-glass what is the alternative now ?

I have this css theme https://github.com/Neikon/Fox11 and this is my config if some one is interested

adaptive-tab-bar-colour

Thanks, I didn't know it. I will take a look at it

You can enable PWA in Firefox, try with this https://github.com/filips123/PWAsForFirefox

More trees, more happiness

the permissions control is done by firefox, and as you can see in the add-ons settings it only asks for access to this list of websites

Access to your data from sites in the domain googlevideo.com
Access your data from sites in the domain youtube.com
Access your data from sponsor.ajay.app
Access your data for dearrow-thumb.ajay.app
Access your data from www.youtube-nocookie.com

and optionally the user can give you access to all sites but it is not necessary. This can be changed but in that case firefox will warn you that the plugin requires new permissions.

toolkit.legacyUserProfileCustomizations.stylesheets ⇾ True

to load CSS themes that make Firefox, your Firefox

Here a theme's collection https://firefoxcss-store.github.io/

I recently installed Manjaro, and tried to install VSC.

In the official repos there is only a free version called Code with which the synchronization failed, and I could not synchronize my settings and plugins. I tried with the Flatpak version and although the synchronization was working, the interface was inconsistent and using zsh from my distribution and not bash in the integrated terminal was complex. Then I gave up when I saw that I could not get a Git-flow plugin to work because although I had it installed, VSC did not see it.

Install the Snap version, the interface is consistent and 0 problems.

So I think it's not a bad thing to gradually move towards more contained apps like snap or flatpak, but there is still a lot of work to be done to make them fit all needs.