I really wanted to like this extension because the author is very transparent about "read all" permissions, why it is required and why this extension doesn't actually read your pages.

Unfortunately, it worked only erratically with Debian GNU/Linux (Gnome 3.38). No amount of fiddling with the "sensitivity" control helped.

I found a better solution is to install a gesture extension from extensions.gnome.org. (I'm using "Extended Gestures" because "Gesture Improvements" requires Gnome ≥4.0) .

it works, but it feels more like a concept. Even if I swipe the smallest amount, it brings me back 2 pages. Not a single browser does that, and I don't understand why this extension does.

tldr: It would be functional if it didn't bring you back two pages at all.

It works, but I wish I could adjust the sensitivity. If I swipe too far it goes back 2 pages and I don't want that. Is there any way to change the sensitivity?

Works great but you mention in the description it doesn't need any permissions, however it asks for "Access your data for all websites" which is pretty much everything? I am confused.