There's a way to rebind keys in Firefox, but it's extremely convoluted: something about editing omni.ja. I feel like Firefox goes out of its way to make it impossible for you to do so. Not to mention that they also go out of their way to be hostile to extension developers (unlike Chrome where you can just load an unpacked extension, with Firefox they impose the arbitrary limit that it gets removed after a restart).
Also they don't seem to care one bit about user experience (in the genuine sense). There's a long-standing bug open for > 10yrs that Firefox does not disable sleep when uploading or downloading files. The day that I started a long-running downloaded and came back to find that my laptop had gone to sleep before it even hit 5% was when I uninstalled Firefox in a rage.
Also they don't seem to care one bit about user experience (in the genuine sense). There's a long-standing bug open for > 10yrs that Firefox does not disable sleep when uploading or downloading files. The day that I started a long-running downloaded and came back to find that my laptop had gone to sleep before it even hit 5% was when I uninstalled Firefox in a rage.