

For web browsing I can navigate alright using spacebar to scroll. Naturally, that works best with a bluetooth keyboard attached, but you could resize the window and use the soft keyboard if you prefer. The “vimium” extension for Firefox makes keyboard navigation much nicer.


It is actually very easy to break your install by doing this if you have made a habit of installing random .deb files from around the internet
APT can’t update things that are not in the repository and .deb files typically only work for a specific version of the OS (which is to say, they will probably work when you install them but break when you update).
You should in general never install a .deb file directly. Sometimes it might be necessary in order to install a program that the developer doesn’t support, but that lack of support should be a flashing warning light that the package will probably break something in the future.
There are ways to purge your system of orphaned .deb installs, and I suggest doing that before large upgrades