Tangerine UI for Mastodon
Recently, I discovered Tangerine UI and found its interface to be quite aesthetically pleasing. However, a clear disadvantage is that the installation and maintenance of the UI must be managed directly by the administrators of the Mastodon instance. Consequently, I sought alternatives to server-side installation, and I have found some, which I shall document here for reference.
Installation of a Userscript Manager within the Browser
I have been using Firefox as my preferred browser for many years and have recently encountered the userscript manager Violentmonkey. The installation can be performed via the browser’s add-on interface, and it may be conveniently located here within the official store.
Installation of the TangerineUI Userscript
On GitHub, @Wire has developed a userscript which may be incorporated into Violentmonkey via this link. Within the script, it is necessary only to supplement the instance in line 6, for example:
// @match https://metalhead.club/*
Upon your next visit to the specified Mastodon instance, the userscript should activate and be loaded accordingly.

Thank you for your attention. 🙂
