Display setup.html after deactivating the addon

[xan2622]

Hi

After enabling the addon, the setup.html is displayed (to ask the user to change some settings in about:config).

But when the addon is disabled or uninstalled from Firefox, it would be convenient to display the same setup.html page once again (to let the user reset the settings back to how they were before).

[djfdat]

You'll need to use runtime.setUninstallURL

Not sure if it'll work with packaged html files, or if it'll need to point to an online resource. See comment:
"This URL must have an http or https scheme."