Due to the system failure my firefox getting hanged

When your firefox hanged did you do a full Profile backup ?

Before that I have taking backup of all the files related to the firefox.

Please could you clarify the exact nature of your backups, that is how you made them.

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How can i restore my bookmark into the new fast dial application.

Fast Dial bookmarks are stored in the Fast Dial Folder in Bookmarks.

So if you have a backup of Bookmarks you could try restoring your previous Bookmarks ?

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Many thanks