While Goolag decided to implement Manifest V3, of course Cuckzilla being technically yet another department of Goolag decided to implement it too.
And this will affect all browsers based off either Chromium or Furryfox, which in current year is almost every browser.
However, there are 2 more browsers you might want to give a try, which are Pale Moon and Basilisk.
And there's Netsurf and all the terminal browsers like lynx, elinks, and w3m, but none of these have extension support (which are necessary bandaids to the fundamentally broken clearnet), and on top of that the terminal browsers can't view any of the modern soy pretending to be websites, or as they call it, "web apps", which is a fictive term powered by the ghost of Steve Jobs.
So why is Manifest V3 such a big deal you might be asking?
Directly from the horse's mouth:
One of the changes of Manifest V3 is it has stricter protocols and requirements for what a browser extension can do outside of its own code, which can be a very valid concern considering how some popular extensions are rather dangerousWhat is a manifest?
An extension manifest gives the browser information about the extension, such as the most important files and the capabilities the extension might use. The extension platform features change when there's a new manifest version.
However, this also has a dark side, because by far the most used extensions people use are ad blockers, because ads are annoying, they distract you, they spy on you, they slow your internet speeds down, they make your hardware (or devices) break quicker which prompts you into buying new hardware quicker (and creating more e-waste along the way), plus modern ad blockers have the ability to block a whole host of other things, like trackers, 3rd party resources, malware, phishing attempts, and in the case of uBlock Origin you can even block elements you don't want to see so you can create a much better browsing experience for yourself.
And since Goolag is an advertisement company, they've been making many attempts in the past of suppress ad blockers, but now that ad blocking has become so mainstream that even your grandma is using an ad blocker, they stopped playing politely, now they really want to make it outright impossible.
They've been working on it for years now, but now that big tech is losing so much money (now that the covAIDS hoax is finally coming to an end in 2 months from now), plus the collapse of SVB bank greatly accelerating their losses (so as a side effect companies will be forced to treat their customers with respect again if they want to make money going forward), I can easily see them accelerating their push to end Manifest V2 support and install Manifest V3 instead.
So if you haven't already, Pale Moon and Basilisk are both great alternative browsers with extension support, plus they are both much lighter on resources.
Even if extensions aren't your concern, it might still be better to get more people off the big 2 (technically 1) browser engines to finally weaken the beast that is Chrome (and Firefox).
Before you say so, no, moving to Brave, Ungoolagged Chromium, Iridium, Edge, Opera, Vivaldi, Falcon, or Konqueror (which are all Chrome) or Librewolf, Iceweasel, FireDragon, Icecat, or Waterfox (which are all Furryfox) is not a real solution.