Feature Request: Ability to pin extensions to the side panel

[gigsoll]

I very love Zen because it is an web browser I was looking for so long in realm of minimalism. The only small downside now is that I have a couple of extensions (the most notable of them is Bitrwarden) that I want to have an ability to add it in sidebar. Currently, I am using a workaround with moz-extension URL. A menu where user can select what to add to the side panel (like it is done in floorp) would be very useful.