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.
As for the “no system is foolproof”, you’re thinking of implementations, not algorithms. An algorithm can indeed be something-proof. Most “known” algorithms are built on top of very strong mathematical foundations stating what is possible, what is not and what is a maybe.
As for the ads thing, Mozilla is not making a dime off this. It is not monetizable. They’re basically expecting that by giving advertisers a fairly “benign” way to do their shenanigans they will stop doing things the way they currently do (with per-individual tracking).
The absolutists might say that there’s no such thing as benign ads, however truth is that the market forces behind ads are big enough that you’d get website-integrity-bullshit rather ad-free web. Having tracking less ads is better than having a “this website only works in chrome” or “only without extensions” internet.
Is there any other possibility? Maybe. Is is reasonable to think that the moment tracking starts getting blocked em masse, we risk a web-integrity-bullshit +wherever-said-tracking-can-exist-only internet? I think so.
I think you’re right and that I’ve horribly misunderstood how this data is collected and used. According to their yearly report, mozilla’s advertising revenue is explicitly not drawn from user data and is only related to tiles and default search engine sponsorships. The fact that they are not selling this information is heartening and it inspires confidence that they have not flipped on the ad money spigot.
