It simply does what it is supposed to do. It would be nice if it was possible to change the user agent automatically at predefined time intervals.

Works as advertised :)

别用排名第一第二的useragent插件了
这个最牛B了
首先多，各平台各新旧版本
再来就是黑名单白名单自定义规则太强大

来使用百度简单搜索APP的useragent来访问百毒看看
Mozilla/5.0 (Linux; Android 7.0; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.116 Mobile Safari/537.36 T7/10.3 SearchCraft/2.6.2 (Baidu; P1 7.0)

すごく良い
非常に見やすいUIで、メジャーなOSはほとんど揃っていて、ブラウザも最新ブラウザでない限りある程度揃っている。
直接編集も可能
javascriptにもちゃんとカスタムUAが聞いている強力なUAスイッチャーです。

Minimal, under 1 MB (not like other extensions which can be up to 8 MB for no reason). Works as expected, great UI. Thank you for developing this, it's a far better option to the more popular extensions.

I love this add-on!
With the recent onset of Apple enforcing its "proprietary" right to use the emojis we are all used to, Slack, et al were forced to switch to their own, non-Apple Color Emoji typeface -- and if you're like me, they're HIDEOUS emojis. This extension allows me to permanently spoof the user agent to an iOS device for specific sites where I use emojis a lot. Like Slack, fb, etc.
When I was using Chrome browser, I could only achieve this by CTRL+I and de-toggling "Select automatically" under the Network Conditions sub-menu inside dev tools. So this permanent fix in Firefox is exactly what I wanted.

This app is so helpful.

Very good addon to go past google search filter limitations when using firefox android browser. I use it to whitelist google domains and load the chrome android user agent when doing google searches so i can have all filters.

I used the Chrome string and was able to login to Directvnow. I am able to watch in Firefox rather than stupid Chrome. I will donate soon.

This is the best useragent switching addon.