Reviews of User-Agent Switcher and Manager

By: Ray Add-on

List of user reviews and ratings for User-Agent Switcher and Manager

Total ratings

4.05 (Rating count: 787)

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Review summary

User reviews for the Firefox add-on show a split experience. A few users found it very useful and rated it among the best UA switchers, especially when it worked and could outperform alternatives on some sites. However, the majority report reliability problems: the extension frequently stops functioning across updates and Firefox versions, and it can break YouTube playback and Google searches, sometimes prompting captchas. Compatibility issues are common, including broken whitelist/containers features and failures on newer Firefox forks. Overall, while it can be helpful in narrow use cases, its reliability and ongoing support are major concerns.

Pros

When it worked, it was very useful and praised as one of the best UA switchers.
It performed well compared to other UA switchers and could fool some sites.
It still had value in scenarios that don't require up-to-date user agents.

Cons

Frequently stops working or becomes non-functional across updates and Firefox versions.
Breaks YouTube playback after a short time, causing the player to stop or crash.
Disrupts Google search and can trigger captchas.
Compatibility issues: broken whitelist/containers features, failures on newer Firefox forks, and removal of per-container UA assignment.
Poor reliability on Android and in general.

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User Reviews

Recent rating average: 3.10

All time rating average: 4.05

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19% (88)

Date	Author	Comment
2026-08-11	oc*****	After installing the extension, a feature introduction page appears. Clicking "Click here to continue," which occupies most of the screen, displays a fake Microsoft-style support screen prompting you to make a phone call. This is a phishing scam page.
After installing the extension, a feature introduction page appears. Clicking "Click here to continue," which occupies most of the screen, displays a fake Microsoft-style support screen prompting you to make a phone call. This is a phishing scam page.
2026-08-09	Fi*****

2026-07-28	Fi*****

2026-07-19	le*****	Was having issues with youtube not showing the subscription feed & learned that changing the size to only show 1 video result usually fixes the issue by forcing the site to use the mobile version. The issue was that I had to keep changing the size to see the results for that trick. so I thought about using a user agent switcher addon as a workaround but I wanted 1 that only worked on that page somehow so the addons/scripts I have still work on the watch pages & the 1 I had installed did not have any way to do that. I found this 1 which allows me to set that tab to load as an android so I can open the video results in a new tab & achieve the goals I was after. Amazing & I may simply use this workaround forever because it removed the shorts & other crap from the feed for me lol.
Was having issues with youtube not showing the subscription feed & learned that changing the size to only show 1 video result usually fixes the issue by forcing the site to use the mobile version. The issue was that I had to keep changing the size to see the results for that trick. so I thought about using a user agent switcher addon as a workaround but I wanted 1 that only worked on that page somehow so the addons/scripts I have still work on the watch pages & the 1 I had installed did not have any way to do that. I found this 1 which allows me to set that tab to load as an android so I can open the video results in a new tab & achieve the goals I was after. Amazing & I may simply use this workaround forever because it removed the shorts & other crap from the feed for me lol.
2026-07-08	eb*****	An indispensable asset in Firefox. It’s a huge lifesaver for testing responsive layouts across different platforms and helps bypass websites that artificially restrict access for Firefox users. A huge plus for the ability to configure custom strings and setup automatic rotation.
An indispensable asset in Firefox. It’s a huge lifesaver for testing responsive layouts across different platforms and helps bypass websites that artificially restrict access for Firefox users. A huge plus for the ability to configure custom strings and setup automatic rotation.
2026-06-29	jw*****	Red Flag: webpage claims "Optional permissions: Access your data for all web sites" but install dialog says this permission is required. It's unclear why a UA switcher requires "Access your data for all websites" but that permission description says: "The extension could read the content of any web page you visit, as well as data you enter into those web pages, such as usernames and passwords. This is used for password managers, shopping tools, ad blockers, etc. " A UA switcher isn't any of those, so... why?
Red Flag: webpage claims "Optional permissions: Access your data for all web sites" but install dialog says this permission is required. It's unclear why a UA switcher requires "Access your data for all websites" but that permission description says: "The extension could read the content of any web page you visit, as well as data you enter into those web pages, such as usernames and passwords. This is used for password managers, shopping tools, ad blockers, etc. " A UA switcher isn't any of those, so... why?
2026-06-03	An*****	For a long time this was my go-to add-on for user agent removal and randomisation, but it stopped working at some point. I run it in custom mode, but it simply always sends my real User-Agent.
For a long time this was my go-to add-on for user agent removal and randomisation, but it stopped working at some point. I run it in custom mode, but it simply always sends my real User-Agent.
2026-06-03	mk*****	Hi, thanks for the add-on. It was a bit difficult at first to figure out how it works, but after I discovered that all the buttons have tooltips, it got much easier. I have an enhancement suggestion: perhaps it would be more convenient if the filter in the popup window would not simply grey out items that don't match it, but hide (collapse) them, so that only what the user searches for is displayed.
Hi, thanks for the add-on. It was a bit difficult at first to figure out how it works, but after I discovered that all the buttons have tooltips, it got much easier. I have an enhancement suggestion: perhaps it would be more convenient if the filter in the popup window would not simply grey out items that don't match it, but hide (collapse) them, so that only what the user searches for is displayed.
2026-05-28	ha*****	I fully agree with the review by Cr: "This extension is unbelievably user-hostile. ..."
I fully agree with the review by Cr: "This extension is unbelievably user-hostile. ..."
2026-05-08	*****	This extension is unbelievably user-hostile. I’m convinced the developer has some deep resentment toward anyone who isn’t a programmer. I genuinely can’t understand how something this frustrating to use ended up being officially recommended by Firefox. Now I finally understand why Firefox keeps losing market share. If I had the option, I wouldn’t even give it a single star.
This extension is unbelievably user-hostile. I’m convinced the developer has some deep resentment toward anyone who isn’t a programmer. I genuinely can’t understand how something this frustrating to use ended up being officially recommended by Firefox. Now I finally understand why Firefox keeps losing market share. If I had the option, I wouldn’t even give it a single star.