Is this downvoted because it's untrue? I've never used (and never found a need for) uMatrix, but I'm curious.

I think it might be true, but it's a lot harder to do uMatrix things in uBO, because the 'advanced mode' just gives you allow/disallow per domain, not the er matrix at CSS/image/media/scripts/XHR/frames/other granularity.

I think you can get that granular in the manual/text based rules edit of uBO in settings, but I stopped looking into it / considering switching fully at that point (I'd always used it in simple mode in addition to uMatrix, just to block cosmetic DOM stuff that uMatrix doesn't do) since I need it to be far easier and quicker than that, as it is jn uMatrix.

So switching to nuTensor (a light-touch security/necessary FF updates only sort of fork) has been on my to-do list.

Scripts, image and frames can be blocked.

* * 1p-script block

* * 3p block

* * 3p-frame block

* * 3p-script block

* * image block

* * inline-script block

CSS, media can be blocked if it has extension:

*.css

*.webm

*.mp4

*.mp3

*.aac

I don't like gifs, so I used to block it through *.gif, which I'm not sure if umatrix can do.

As I said, only in the manual rext entry rules in settings.

In uMatrix that's one click in the appropriate column per domain's row, in the toolbar drop-down.

Scripts, image and frames can be blocked with one click in ublock too.

One and not the others?

My uMatrix default is all cookies blocked; third-party media, scripts, XHR, frames, other blocked. Of course I often then have to allow some third-party script, and I can do so in one click without also allowing XHR or frames to/from that domain.

uBO doesn't allow that (in the toolbar UI, 'advanced'/'more' mode), because it's missing the columns from the 'matrix', so you either allow/block a domain wholesale.

Yes, uBO in it's current state can do everything uMatrix can do. I don't think this was true "from the beginning" but it is true now.