Feature the Flag от Lennaert

This add-on allows you to easily add or remove query parameters to a site's URL, e.g. change from `https://example.com/some_page` to `https://example.com/some_page?enableFoo` and back again.

It stores any parameters so you can easily add them again.

Usage

• Click the extension icon. This shows the list of configured parameters that you configured for this domain,
• Click a parameter to add or remove it from the URL.

To add a new parameter:
• Use the `Add new` field and press Enter to add it.