Reviews for User-Agent Switcher
User-Agent Switcher by ntninja
Response by ntninja
Developer response
posted 7 years agoThank you for your review! The “huge cache of hundreds (!!!) of files […], which may be completely removed” are in fact used to generate sensible values for the `navigator.*` browser identification values. Parsing information like operating system, CPU type, device type, … is not a simple affair as there are no standards at all – one just has to guess based on the COMMENT parts of the User-Agent string. Fortunately the BrowsCap project has maintained a list of matching patterns for figuring out this information since 1997 that is extremely reliable. As such, I will continue using it even if it means bloating the extension size by about 3MiB. The fact that it allows everything to just work out-of-the-box with just a single input value (the User-Agent string itself) definitely outweighs that, by comparison small, price.
I would like to think that, if you don't need this complete level of emulation, then you may use just about any of the other User-Agent switching extensions because – to my knowledge this capability is unique to this extension.
- Alexander
I would like to think that, if you don't need this complete level of emulation, then you may use just about any of the other User-Agent switching extensions because – to my knowledge this capability is unique to this extension.
- Alexander
551 reviews
- Rated 4 out of 5by fgxxr, 3 days agoEasy to use (although a bit confusing if you're using it for the first time) and does as advertised.
The only issue I've seen recently is that videos on YouTube stop playing after a few seconds and an unexplained error prevents the video from playing every single time. Disabling this add-on instantly resolved this issue. I will change the rating to a 5-star as soon as I find a way for the addon to work again without this disturbance, or this issue is patched. - Rated 1 out of 5by Firefox user 19581717, 17 days ago
- Rated 1 out of 5by Firefox user 16549430, 21 days agoI have changed to a different agent switcher as this one causes a Cloudfare verifying continuous loop.
- Rated 5 out of 5by Seän "frostbyte" Shepherd, a month ago
- Rated 4 out of 5by Firefox user 18285487, a month ago
- Rated 5 out of 5by Firefox user 16926458, 2 months ago
- Rated 2 out of 5by Xenofox, 2 months agoI use this extension for many years now. But sadly the development is very slow. It's very outdated, you're stuck with very old and on many websites not anymore supported browser-versions to choose from like Firefox 134, Firefox 128 ESR, Safari 17, Edge 131. Also no matter which browser you choose from, on browserleaks.com/javascript its still possible to see that mozilla is used (the parameter appCodeName shows "Mozilla". So please ntninja update the extension!
Edit (2025.11.05):
In it's actual deprecated state this browser extension breaks the Cloudflare Bot Challenges.
If a website uses any of Cloudflares Anti-Bot Challenges it will break the website and render it useless. - Rated 5 out of 5by Firefox user 19437637, 2 months ago
- Rated 4 out of 5by ArtchibalD, 3 months agoPlease add a redefinition for Yandex Browser (Window), because I'm tired of seeing annoying ads in Firefox every time I search!
PS: Windows / Yandex 25 [Desktop]: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0 - didn't work - Rated 4 out of 5by cj, 4 months ago
- Rated 5 out of 5by frostbyte, 4 months ago
- Rated 5 out of 5by E.C., 5 months agoThanks, I can see high quality Facebook Reels on Firefox because of this extension
- Rated 3 out of 5by Nocturne, 5 months agodoesnt keep itself isolated using "only for this site" pref. Apparently it enables selected UA for *all* sites, and for ones you didn't want you have to opt-out... Not best UX
- Rated 5 out of 5by seanS, 5 months ago
- Rated 5 out of 5by TurboZag, 5 months ago
- Rated 5 out of 5by iM, 5 months ago
- Rated 5 out of 5by TheK0tYaRa, 5 months ago
- Rated 1 out of 5by Adrien, 6 months agoPlante instantanément Firefox mobile.
Instantly crashes Firefox mobile. - Rated 3 out of 5by Synetech, 6 months agoThis used to be the most functional useragent-switcher (even if the UI/UX was left wanting), but even this doesn't seem to work anymore. 😕