No, that isn't possible.

The "Recently Bookmarked" list shows the result of a query and isn't a real existing folder. Any action you perform on an item in this list is done on the actual bookmark, so if you would remove an item then you remove this bookmark. If you add new bookmarks then this item will shift down in the list.

As I'd like this to be included in a future version, could you point me to a site where I can file this as feature-request?

b-man said

As I'd like this to be included in a future version, could you point me to a site where I can file this as feature-request?

You can submit your suggestions through a variety of channels:

• Feedback: https://qsurvey.mozilla.com/s3/FirefoxInput/
• Discourse: https://discourse.mozilla.org/c/firefox-development
• Reddit: https://www.reddit.com/r/firefox/
• Twitter: https://twitter.com/firefox
• Facebook: https://www.facebook.com/Firefox

One question for someone to think about is, where would the "hide from Recently Bookmarked" flag be stored? When you arrow down on the address bar suggestion list and press Delete to remove a history-based suggestion, that seems to be stored somewhere. Perhaps it could be in the same place, or those could be linked? (Bookmarks and History are stored together and share some data tables.)

Thanks to both of you.

If you press the Delete key to remove a selected item from the drop-down list then this item is simply removed from the history. You wouldn't want to have this happen with a bookmarked link, i.e. you delete the bookmark if you press the Delete key on a selected item. So this is not a flag that is set, but merely you remove this history item.

cor-el said

So this is not a flag that is set, but merely you remove this history item.

But if there was a flag (e.g. noRecent) in the database or json etc., the query you mentioned could only include bookmarks with that flag not set.

From the top of my head I could think of two ways to incorporate it:

When you create a bookmark by clicking the star in the urlbar, a popup is shown, 1. in this popup there could be e.g. a checkbox which causes the flag to be set 2. in the "tags" input-box of the popup a tag may be specified that has the same effect on the query as setting said flag. Tag-semantics may be either pre-configured or user-set somewhere else

Edit: 3rd way: The flag is transparently set by highlighting an item in the "Recently Bookmarked" list and pressing Delete key. Either there is no reverse or it may be set somehow in the library editor.