Google is changing the way extensions work and eliminating the dynamic filtering that ad blockers rely on in the process. Ha ha, this again? No, Google isn't ending ad blocking. They're launching something new for extensions, which will fundamentally change the way they work, so extension developers will have to update their extensions to be able to work on what's new. When this was first announced, there was speculation that blocking ads wouldn't be possible with the new system, but the new system hadn't been released yet and no one knew anything for sure.
Recently, the developer of Ublock Origin, one of the most popular ad-blocking extensions, discovered a way to consolidate filters, allowing tens or even thousands of filters to be loaded as a single “filter” in the new Manifest v3 system, demonstrating that developers are intelligent people and that they will probably find a way to avoid anything Google does. Everything's going to be all right. There is a growing divide over how much space browsers should leave for blocking ads, and Chrome and Firefox have ended up on opposite sides of the fight. Chrome's built-in solution forces ad blockers and privacy extensions to use the primitive solution of a raw list of blocked URLs instead of the dynamic filtering rules implemented by something like uBlock Origin.
Firefox's stance on ad blocking may encourage more users to switch to the browser, which is currently estimated to represent less than 8 percent of the desktop browser market, compared to 67 percent for Chrome.