Simple but it works. No extra features, no bloat. Can import/export the list of presets, and it is also available on Chrome.
I wish it had a light icon for use in dark theme.
I wish it used `chrome.storage.sync` for saving the presets, as that would automatically sync across browsers under the same account.

シンプルで使いやすい。
しかしViewPortでの指定ができないので、サイドパネルを多用する場合は使いにくい。

Freezes/crashes latest Firefox for Mac on clicking a resize option.

Great customizable extension, but sadly the window is resized from the top left corner. It should be better from the top right corner, or please add an option to lets the user decide. Thx developer for your job!