PUBLIC MARKS from decembre with tags profile & update

Once a profile has been used with Firefox 55 (or later), it should not be used with previous versions of Firefox. IndexedDB, the (DOM) Cache API, Service Workers, and the asm.js cache will all fail to operate, generating confusing errors and causing portions of Firefox and some websites to break. The profile can be made operable again in older versions of Firefox by using the profile "refresh" mechanism.

Firefox and other XULRunner applications store user settings and data in special folders, called profiles. Firefox provides a built-in applet to manage these profiles, but it will eventually be going away (see bug 214675), so a new standalone Profile Manager application has been created, which works with any XULRunner application, and has many features not found in Firefox's built-in version.

CheckPlaces is a Firefox extension that allows you to check your bookmarks in different ways. There is a basic check of your bookmarks, and optional checks that the pages still exist, duplicate bookmarks, and empty folders. You can also use it to restore favicons that have gone missing, and compact and check the integrity of the Places database. * Export an XML file with the results in * Update/overwrite existing favicons * Ignores all invalid security certificates or other SSL popups * Database check and compact messages to results window * Added support for Firefox 4.0 *Details were missing from 'Show excluded items' dialog.