This. I love Opera, but I need my Firefox for Adblock and all the other little handy plugins. So please, convert us both by providing a link to a plugin database.
If Opera can have a plugin or userscript like adblock, then I'd use it but I doubt that'd happen since adblock is sorta illegal and isn't really liked by most websites that have ads(legit) theres been talk about websites blocking firefox because of that plugin. Although Opera is alot more smoother than Firefox especially with the skins, it doesn't need a restart to apply.