Describe the bug
When the extension is opened on any seasonal anime page off of MAL (url ends with /anime/season/*), it shows a page with no information. A user can try to add a nonexistent anime named "anime database" to their MAL. Rather than that, the extension should display the user's anime list/the seasonal anime in the extension.

This is what the extension looks like when it is opened on a seasonal anime page off of MAL.

This is what happens when I try to update my MAL via the blank item in the extension.

Steps to reproduce the behavior:
Open the extension on any page seasonal anime (url begins with https://myanimelist.net/anime/season). You can then try to update your MAL via MALSync, which will return an "update failed."

Additional information:

• Browser: Chrome
• Type: Extension
• Url: https://myanimelist.net/anime/season(/*)