I can remove the regex warning and instead just have it list a note at the top about using regex that is a substantially less obtrusive. As for the container redirection, I will look into updating it to only redirect for normal tabs and not tabs already in a container. As for links opened via links in an already established container, IDK if there is any way to handle that. I will look into it. Feel free to open an issue on the GitHub page and I'll use it to track and update as needed.

Edit: Version 1.1.1 should be releasing soon and should resolve the warning error, as well as making it easier to find the options page. The extension icon is now clickable and redirects to the option page.