Not user friendly, Terrible UI. User Can't simply SAVE custom user-agent strings. for standard use, FAQ (its really a "FA-Q") must be read.

Doesn't seem to be designed for easy mobile use

Great addon

Work well.

its seems that i use mobile but i use pc)))))

對於某些特殊的頁面，這個真是太有用了。

Popup is now completely gone...

It is a good manager but lacks easy to use features such as random agent switcher for increased protection against browser fingerprinting.

Doesn't seem to be able to spoof the Operating System...

see https://www.whatsmyua.info/