I love this extension. I use it in both Firefox and Edge.

The only improvement that I wish the developer would make would be the visibility of the "DEFAULT" button to revert the user agent to the default setting. Instead of being hidden in the bottom row of icons, it should be a big green checkmark or something. Still a very useful extension !!

When returning to the default
[Are you sure you want to switch to the default user agent?]
Then, a confirmation dialog appeared and I could not return it unless I clicked [YES].

It is difficult to use due to the increased number of extra actions.

The dialog does not appear as before. Or issue a confirmation dialog, do not issue,
Wouldn't it be possible for the user to make a selection in the settings?

Thank you.

●「お使いのブラウザのバージョンは非対応です」と表示されて閲覧不可能なサイトでＵＡ偽装すると、閲覧可能になるので便利です。
●ポップアップメニューの文字列の右側が見切れますが、チェックを入れると問題は解消されました。
●可視性の問題。
「バッジテキストにＵＡを表示」にチェックした場合→「W/F」文字列＝黒、四角形＝暗いグレー
明暗差が小さいため、見にくい。
見やすい例：文字列＝白、四角形＝黒
●This is useful for sites that are not viewable because of the "Your browser version is not supported" message, but can be viewed by disguising the UA.
●The right side of the popup menu text is obscured, but checking the box fixed the problem.
●Visibility issues.
When "Show UA in badge text" is checked → "W/F" character string = black, rectangle = dark gray
Hard to see due to small difference between light and dark.
Easy to see example: character string= white, rectangle = black

Easy to use and configure and gives me some peace of mind.

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It needs to make the predefined user agents read only, but allow cloning. How about a fourth row of customised agents?

Also it's not obvious that the 2nd and 3rd rows need to be selected together to form a Broswer-OS combination.