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.

Everything is perfect so far. Thank you!