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.
If any site doesn’t work you can try this official addon Chrome Mask. If it works with it on you can report it Mozilla.
I"m going to try that extension to see if it helps with a couple of websites. So thanks for the recommendation!
Thanks for sharing the extension! I just got some passkeys and they just weren’t working on several websites for Firefox (looking at you Azure) but that solved the issue immediately!
Be sure to report a bug to Mozilla regarding those pages!