Google chrome custom search engines at the context menu?

Actually I have two questions:
1. Firefox in its last version v3.6 doesn't support "Add to Search" plugin anymore, and I need it badly in every surfing session to add any search box to my custom search menu. Is there any other plugin which can do this job and supported by v3.6?

2. If there are no other options regarding to Firefox, I want to use Chrome in the same way; to add any search box to a menu that can be accessed through the context menu (right click). Are there any Chrome extensions which can help me in that?

Thanks