Addons that can do one the other or both. I looked in the Firefox addons store for but most of them have their own GUI for doing so. That could work but ideally I’d like to select a folder or some bookmarks in the bookmarks menu or sidebar and select a context menu option to refresh those favicons and or titles, its possible to run context menu options on multiple selected bookmarks like that, like copytabtitleurl.
Update? First you should get “cache favicons for bookmarks”, its by a Mozilla dev (I think) that also does the “reject webp” addon.
404 bookmarks is also awesome.
For reloading idk. Will be possible though.