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WebExtensions - Fix for FF IDSafe???
WebExtensions are a new way to write Firefox extensions and coming in FF46.
This may be what Norton is waiting on to fix FF toolbar.
This is speculation on my part but since FF is still changing the game I think this may be the future.
WebExtensions are currently in an experimental alpha state. From Firefox 46, you can publish WebExtensions to Firefox users, just like any other add-on. We're aiming for a first stable release in Firefox 48.
WebExtensions are a new way to write Firefox extensions.
The technology is designed for cross-browser compatibility: to a large extent the API is compatible with the extension API supported by Google Chrome and Opera. Extensions written for these browsers will in most cases run in Firefox with just a few changes. The API is also fully compatible with multiprocess Firefox.
We intend to deprecate XUL and XPCOM-based add-ons, and encourage add-on developers to use the WebExtensions API for new development.
FF 46 is scheduled for release in early April.