Unfortunately it doesn't seem to load properly, causing layout/style issues.

I really like it, but the icon should have an alternative color when using the dark theme, since in the new Proton UI it is not much visible.

[Feature Request] Add also search highlighted text search on sidebar(maybe by the default search engine?)? That would be very convenient.

Excellent utility, I am already finding it very useful for keeping an eye on running dashboards whilst doing other tasks. The only thing I am missing is a keyboard shortcut to toggle the view - perhaps alt-shift-s?

Great that it has a "request mobile site" option, but what is really needed is a "Request Desktop site" option. Sites like airtable refuse to show a mobile site as they want us to get an app. On vivaldi I can tick show desktop which works.
I hope you can add this feature.

Thank you for re-instating this FF feature!

I've been using this for a long time now, and I've never had any problems with it. It's also great for organizing your bookmarks!

Invokable from page, link, and bookmark, but there is no way to refresh the sidebar and it’s not remembered over browser restarts

It is not working for me with bookmarks sidebar, no menu item. Is it possible to use it with Firefox about: pages?