sudo apt-get install gnome-browser-connector Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package gnome-browser-connector
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It’s not in Pop’s repo as it indicates from that error. It looks like you have to build it from source. https://gitlab.gnome.org/GNOME/gnome-browser-connector.
Question though - Why don’t you just use the shell integration add-on that already exists? https://addons.mozilla.org/en-US/firefox/addon/gnome-shell-integration/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search
Is your goal to install extensions from the Gnome extensions site?
If so, I remember about a year ago having similar problems. I would up switching to the app “Extension Manager” from flathub and it works really well. I never bothered fixing the browser connector.
GNOME recommends using the extension manager. The web connection isn’t maintained anymore.
Try „sudo apt update“ before trying to install gnome browser connector.