> By releasing an extension built with Manifest V3 today — first among developers of ad blockers – we can say that we've met the challenge that Google posed to us. They shouldn't do this IMHO. Manifest V3 is a horrible attempt to kill adblocking (under the banner of "security", as always). But, the web is completely unusable without adblocking. If there are no more (effective) adblockers for Chrome, users will franti…
Firefox is building MV3 and while they are coy with deprecating MV2, we all know, c'mon, they won't keep MV2 even a day after their minimum year promised. Their track record speaks against them. XPCOM extensions? Killed, but don't worry, we will re-implement all the needed APIs as WebExtensions (didn't happen). Fennec to Fenix mobile extensions? Killed, you get these 10 blessed ones, don't worry, we will eventually r…
In both transitions, Mozilla made sure to support the needs of both uBlock origin and NoScript, extending the webextension API (such that uBlock origin on Firefox is more capable than on current Chromium) and working with uBlock to make its interface more mobile-friendly.
They also extended the webextension API to allow for extensions such as Treestyle tabs and Panorama-reimplementations (so not remotely all XUL use-cases, but still most of the popular ones).
Hence, they've proven that they will go considerably beyond what Google/Chromium are doing, and that they won't harm "content-blockers", which is what we care about in this case.