The move begins with Chrome beta users on June 3, before a gradual phaseout of 'Manifest V2' extensions for all users in the coming months, which could impact uBlock Origin.
afaik it’s not only for google chrome but for chromium in general. so privacy friendly browsers like brave and degoogled chromium are also affected unless they fork the chromium project or something.
I use Mozilla every single day and have done so for about 6 years now. Personally I don't feel like I'm missing out on anything but ads if I don't a Chromium based browser.
I’ve been using Mozilla products for going on 20 years on my windows PCs, and other than websites arbitrarily deciding they don’t work on non chrome browsers, I’ve rarely had issues.
It is viable, just lack diversity in terms of web engine. Web tech today are just too complex to have another web engine. Even Microsoft ditch its EdgeHTML and favor Blink, the engine used by Chromium-based browsers.
Some Chromium browsers like Brave and Vivaldi already announced they'll extend it for as long as they can, and when they no longer can't, they'll think of something else like improve their own blockers.