A bundle of "Old LiveJournal favicon" <https://addons.opera.com/addons/extensions/details/old-livejournal-favicon/>, "Livejournal style=mine" <https://addons.opera.com/addons/extensions/details/livejournal-stylemine/> and "Open spoilers" feature.
1. Replaces new lj favicon with old (pencil)
2. Rewrites current LJ-url to version with your main theme.
3. Highlights spoilers and makes them collapsible.
4. Sets a fixed width to text and removes nondefault "font-family" property.
Each option can be turned on/off from preferences.
/!\ "Spoilers" is the test feature of LJ for now.