EDIT: Apologies. Updated with a link to what gorhill REALLY said:
Manifest v2 uBO will not be automatically replaced by Manifest v3 uBOL[ight]. uBOL is too different from uBO for it to silently replace uBO – you will have to explicitly make a choice as to which extension should replace uBO according to your own prerogatives.
Ultimately whether uBOL is an acceptable alternative to uBO is up to you, it’s not a choice that will be made for you.
Will development of uBO continue? Yes, there are other browsers which are not deprecating Manifest v2, e.g. Firefox.
You know there are other ad blockers? Other browsers have them built into the browser itself so there’s no need for any extensions at all.
You realize Mozilla is selling your data, regardless of what extensions you have?
uBO is the best one though. And Firefox is one of the major mainstream browsers. Is easier to get people to change to something well known rather than an obscure browser like librewolf.
Mozilla doesn’t sell your data if you use Librewolf (or if you just opt out)
Then use LibreWolf.
I just think it’s hilarious that people fall over themselves lambasting private Chromium alternatives while vehemently supporting a browser that is openly selling your data.