If I try to rename a container - Edit Container, select the pencil icon - edit the name, it appears to work but when I hit Enter or the back button it is not renamed. Restart firefox and it is still not renamed. This is version 6.2.1 of the extension I posted this previously but it was marked a duplicate https://support.mozilla.org/en-US/questions/1279756 It isn't even remotely a duplicate other than it uses the same extension provided by Mozilla. If this isn't the best place to report these issues than why not tell me where to do so rather than marking a unique question a dupe?