Hi. These settings should work. If refreshing your browser doesn't help, please report the issue on GitHub, along with browser and extension versions and I'll try to help figure out what's wrong.

What doesn't work? If you are referring to the redirection to "Old New UI", Reddit is discontinuing this version and users will eventually loose access to it. There is nothing I can do about it unfortunately.

You need to be signed into Reddit unfortunately for it to redirect to the Old New UI, otherwise Reddit will force a redirect to the latest version, causing this error, as it conflicts with the addon redirect function.

Edit: It seems that Reddit has now broken, or disabled, new.reddit.com for some users. Other redirect extensions are having a similar issue apparently. I'm not sure if this is something Reddit will fix, or if they are doing it deliberately to force users onto the latest version :/

This is unusual, sorry about that. If you still have this issue after restarting Firefox and re-enabling the addon, please create a new issue on the GitHub page so I can assist you further. The link is in the addon or on the store page. Thanks.