Impossible to select Tab Container in FoxyProxy options if id is > 4

[HCl-not-HCi]

When creating tab containers in Firefox, they get an an id, which is incremented for every container. Deleting all containers and creating new ones does not reset this id. The problem is that you can only select the first four ids in FoxyProxy, making it impossible to select containers that were created after the first four containers.

Example: The first four containers get the ids 1 to 4. They can be selected in FoxyProxy without problems. If I delete those containers and create a new one, the new container gets the id 5 (even if the first four containers are deleted). This makes it impossible to select the new container.

The best solution would be to show the available containers in the FoxyProxy options.

Workaround: In the folder where your Firefox profile is stored, edit the file containers.json and set the ids back starting with 1.

[erosman]

Previously: #33