This now works with versions of FF 71 and later.

This has fixes for FF versions 63 and later:
1. Display the group editor page correctly
2. Display the context menus in the dialog correctly.

Also the backup operation can now directly save to a file.

This adds a security feature for certain customers.
Otherwise there has been no change to functionality.

This fixes some problems with FF 61 and later.

Please report it if you see the killit popup appearing with nothing in it. This is a FF bug.

This is the Web Extension version. The previous version used Firefox's XUL technology to work smoothly. This Web Extension version has suffered the following losses.

• The (right-click) context menu in the editor now has all actions in a submenu. This is rather clunky.
• The editor context menu no longer contains short cuts.
• It is no longer possible to backup to a file. The best that can be done is to backup to the clipboard and you have to manually paste into a file.
• The Chooser panel pops up with a title bar which slows it down and means that there is no longer any smart control of its position.
• The Chooser can no longer find iframe elements. These are often the containers for advertisements. This may be fixed in a future version.
• When leaving the editor there is a "leave the page or stay" confirmation box that pops up that can't be dealt with properly (at the moment).

All-in-all not a good result. Thanks Mozilla.