So, the elephant in the room is Chrome killing ad-blocking.
I think that Firefox (and Firefox forks, like Zen Browser) have low-enough marketshare that websites that depend on ad revenue may just kill support for Firefox if Firefox does permit ad blocking.
There’s always PiHole to block ads at the network level. It takes some setup and a raspberry pi but it can be one of the cheaper ones. And I’m pretty sure the sites aren’t going to do much more than check the User Agent to get the browser so User Agent Switcher will get around 99% of that.
You could, I suppose, block Firefox in other ways (like maybe checking for some random Chromium feature not yet supported in Firefox) but Firefox isn’t usually far behind Chrome so it would almost take an entire new developer to be effective. And there’s probably ways around that too. (I’m a web developer but have never worked on an ad-supported project and never will so I’m not sure but life finds a way.)
I think that Firefox (and Firefox forks, like Zen Browser) have low-enough marketshare that websites that depend on ad revenue may just kill support for Firefox if Firefox does permit ad blocking
An argument could also be made that Firefox and its forks have low-enough marketshare that websites that depend on ad revenue won’t want to deal with the extra work of keeping those users out.
Glad that I moved to firefox 4 months ago and then to zen browser last week to avoid plugins removal. Haven’t looked back
So, the elephant in the room is Chrome killing ad-blocking.
I think that Firefox (and Firefox forks, like Zen Browser) have low-enough marketshare that websites that depend on ad revenue may just kill support for Firefox if Firefox does permit ad blocking.
https://gs.statcounter.com/browser-market-share
As of February:
Chrome: 66.3%
Safari: 17.99%
Edge: 5.33%
Firefox: 2.62%
The software used to view the Web, in 2025, is really under the control of either Google or Apple.
A lot of Firefox users spoof the useragent.
There’s always PiHole to block ads at the network level. It takes some setup and a raspberry pi but it can be one of the cheaper ones. And I’m pretty sure the sites aren’t going to do much more than check the User Agent to get the browser so User Agent Switcher will get around 99% of that.
You could, I suppose, block Firefox in other ways (like maybe checking for some random Chromium feature not yet supported in Firefox) but Firefox isn’t usually far behind Chrome so it would almost take an entire new developer to be effective. And there’s probably ways around that too. (I’m a web developer but have never worked on an ad-supported project and never will so I’m not sure but life finds a way.)
An argument could also be made that Firefox and its forks have low-enough marketshare that websites that depend on ad revenue won’t want to deal with the extra work of keeping those users out.