Well, this add-on is quite good and works exactly how I need, but I am missing very much another another one Alice had, which saved me so much time ans nerves. I am talking about the Go Parent Folder in FF library. Maybe you could are it work with the present versions of FF, please? Give us an idea. I tried to tell her this through her site, but it is very difficult and is all written in Japanese and you know Google does not translate many things in there.

@ooFn.
Thank you for your reply. I know about the changes with FF extensions. The information about it was published about one year before it happened. What I meant was a suggestion to adapt alice0075's Go to Parent Folder like you did with this one. I still have the xpi file, now useless, of course.

Very nice work, many thanks.

Favicons are retrieved even when the user has set Firefox to block favicons everywhere:

// disable favicons in shortcuts
user_pref("browser.shell.shortcutFavicons", false);

// disable favicons in tabs and new bookmarks
user_pref("browser.chrome.site_icons", false);
user_pref("browser.chrome.favicons", false);

// disable favicons in web notifications
user_pref("alerts.showFavicons", false);

Having 'Bookmark search plus 2' respect Firefox's favicons' settings would be appreciated.

EDIT after developer's response :

Since it is not possible to synchronize the favicons' display with that of Firefox maybe an option specific yo BSP2 regarding Favicons would do it, as for instance in the 'Flagfox' extension, such as 'Favicons Yes/No'
This is neither an issue nor even a true enhancement, but an option for users who wish not to retrieve Website icons (which by the way also adds time to the process). I think more users than we may imagine block favicons.
The idea is that I don't see why connections to sites would be performed for accomplishing a task (localizing a bookmark in the Library) which is basically an off-line process.

EDIT 2 :
Version 2.0.15 now includes a 'Disable favicon fetching' option : rating updated from 4 to 5 starts.

Thank you for resurrecting "Bookmark search plus" !!

1.) In the Firefox Control-B, if you right-click and select Properties there are Keywords and Description fields. These are missing from your Control-Q right-click, Properties dialog. :-( :-(

2.) Please add search for Tags, Keywords and Description fields

3.) When you right-click on a bookmark, the context menu pops up. If you click Esc, it exits and closes the context menu - good. However, if when the context menu is showing, if you click elsewhere off of the context menu (like on an open browser page) then Esc no longer works to get you out of the context menu.click something in the menu. Suggestion: when you click elsewhere, close the context menu.

Had not idea about drag-n-drop (1). You have to publish these reviews as separate book(mark:). Thanks a lot for addon.

Finally an extension that shows parent folder. Good job!

For some reason, after performing a search, the results keep flashing as though it keeps refreshing. That's a problem because when I try to scroll down the results list, it refreshes after 1-2 seconds and sends me back to the top. I don't see an option to turn off this constant refreshing.

I'm sure the developer will fix this, so I'll still give it 5 stars. I'm happy to have the parent folder search.
Thank you!

This Add-on mixed all my > 2.500 (!) Bookmarks. Absolute horror.
Thank goodness I've got a backup. Only need Parent Folder. Keep on lookin.

First extension since Firefox 57 to include the "go to parent folder" functionality. Great!

At last I can find my bookmarks in my folder structure. Thanks a lot.