Dafuq is wrong with Fennec (Firefox via FDroid), since last update it has become extremely slow when loading web pages (first connection)

Oblomov, from the recent week on F-Droid:

Fennec F-Droid was updated to 142.0.0 and got a lot of publicity, and not for how great it works, unfortunately. It appears the slow spell hit it too as there’s an issue using extensions that use webRequest listeners, like uBlock Origin, Privacy Badger, Ghostery, TamperMonkey and more, that delay the connections to websites on start. For now we recommend to try a couple of things. […] First trick is to disable the extension, wait, hear me out, just toggle it OFF then ON back again. […]

Second, […] some users reported success if instead of swiping it you actually close it. The Close button appears in the main menu if you enable “Delete browsing data on quit” in Settings. e.g. “Cached images and Files” is the least annoying option to select, careful not to select any of the others. So, when you want to close the app, just use the button and on the next start it should load pages normally.

Third, our own linsui pointed that, […] when you open the app, if you see it stand there doing nothing, lock the device and then unlock it. […]

Me too, xrvs, but only half of the times. Also to Oblomov, here's the archived page for convenience. Cc: F-Droid