We have covered two methods here. The first method guides you if you have just deleted the bookmark accidentally and would like to undo the changes right away. The trick works only if it finds the browser has not been closed and reopened. The second method covers somewhat you may call as a delayed response i.e. only after you find an important bookmark missing from the list, you realize you have deleted something worthwhile and would like to undo the mistake.
Method 1
Hover the mouse cursor over ‘Display Bookmarks’ option in the upper right-hand corner of your computer screen. Click the option.
Library window opens on up. Select the ‘Organize’ section. Under it, choose ‘Undo’ option. This will undo the deletion.
Method 2
Firefox by default, creates a backup for your bookmarks. All you have to do is restore bookmarks from the auto-saved backup. Here’s how to do it!
Follow step 1 of method 1 and then, select “Show all Bookmarks” option.
Next, click “Import and backup” menu and hover upon “Restore” to select the date from the “Organize” menu to which the bookmark is to be restored.