Yes, FF still support Mv2, some Chromium Browsers too, but Mv2 will disappear sooner or later, yes or yes. Also correct that ad filterlists are limitated in Mv3, but on the other hand they have a better cookie handling as Mv2, mainly against tracking, which is the main problem, not so the ads. But as said before, this will be the main reason because Mv2 will disappear for all browsers in the nearer future, because the incapability to handle the tracking tecnology of a lot of websites. Apart the additional work for a lot of devs to maintan two versions of the same extension Mv2 and Mv3. Yes, uBOlite is Mv3, but its only advantage is to be hidden from YT anti-Adblock algorrithm, apart of this, the Vivaldi blocker is way better in all aspects. uBOlite has nothing to do with uBO, even AdBlock Plus is way better. The reason is, that Gorehill don’t want to put much effort in uBOlite. Limited Filterlists are not a problem in an inbuild Ad/Trackerblocker, there you can put the filterlists you want, out of the control of Google and the store, Google only can access the installed extensions from the store, if he delete these in the store, they also disappear in the browser. He can’t do this with inbuild features and tools in the browser itself. Less, if you, like I do, install the Portmaster on desktop, with wich, apart to monitor and if needed block all the traffic, also use an own DNScrypt with dynamich and customizables filterlists to show the middlefinger to all these data hogs.