Interesting, I'll look deeper into that. They have an adblocking engine as well though and catch a few random ones uBlock doesn't, so I'm not totally convinced they are fully redundant.

Following the pro-Mull comments here I've given it a try for a solid 48h, and just reverted back to Fennec. Mull is simply restricting the user experience too much, and I'm not willing to make the sacrifice.

My biggest annoyances:

1. Websites don't get information about dark mode from my device and revert back to light mode by default.
2. Websites don't get information about the system time on my phone and deliver content based on GMT+0.
3. Some websites get wrong (or none?) information about the screen resolution and are unusable.

I'm aware that those details are suppressed to avoid fingerprinting, and while I believe that the intention is good, it makes using my phone more cumbersome, and that's not something I'm willing to do. So my choices at this point are basically to keep using Mull and deactivate the advanced fingerprinting protection, or use Fennec as before.

Yeah, okay. So: Clearing Browser cache is a common feature in any webbrowser (even Chrome, and if Chrome has it, everyone has)

Regarding insights into the local cache: Are you technically versed enough to understand what you are seeing? If not, what good would looking at the cache do to you? I mean, whatever is in that cache is no indication about your privacy at all. As @minitycactus found out, Wikipedia logs your last visit. Do they spy on you? Very probably not. Besides, whatever they put into local cache is not something they have on their servers,

I wouldn't put too much energy into a search for that specific feature.

Not usually, I don't find it necessary most of the time. I have a separate pw manager (bitwarden) and if I need to share tabs I just message myself