It works. I use the whitelist mode for specific websites. The user interface throughout the extension could use some bells and whistles.

I don't know why there's so many people saying this doesn't work and I barely understand this thing, but I used this to make YouTube load faster. Spoofing as Chrome, the site loads in half the time than it would take without this extension. Unfortunately it does seem to break some captchas, like cloudflare, as in after pressing "I'm human" or whatever; it just loads and the the captcha gets refreshed, so it never proceeds to the site.

No use.

Love this tool, but it seems it breaks some captchas, like cloudflare's.

Thanks to the author.

It's really useful!

it's doing what it's supposed to do

unstable with deezer.com on firefox 123 win64

Very useful add

does nothing in the latest few versions of firefox

If this add-on has a UI, it completely escapes me.

great experience

The option to change the global user agent "Apply (container or window)" doesn't work even on the website "webbrowsertools.com". Tested on Firefox 121.0.