Not really an add-on. HT Reddit
I personally found it annoying having to spam my esc key 5 times in order to even log in, so here's a fix:
- First, close the game completely.
- Locate the UserSettings.txt in the document folder, path should be something like C:\Users[name]\Documents\Elder Scrolls Online\live
- Find the line SET SkipPregameVideos "0" and change the "0" to "1". Then save the file and close it.
Clicking play on the launcher will now take you instantly to log in screen.