Perform Searches On Multiple Search Engines From Address Bar
URL bar search is another handy Firefox add-on which makes searching easy with multiple search engines.
If you use many search engines (if you don’t, you should) then this add-on is a must have for you. You can assign IDs for engines, like ‘g‘ for Google. Once, you have configured this add-on you can use it directly from the address bar.
For example, to search a query on Google start your search with Google’s ID. Hence, if you have opted the ID ‘t‘ for twitter search and want to search #indiavotes09 on twitter, simply type ‘t #indiavotes09‘ in the URL bar and hit the return key.
KwiClick is another Firefox add-on to search on multiple sites easily. 
Link : Install URL bar search – Firefox add-on
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Perform Searches On Multiple Search Engines From Address Bar | NhanLife Search Said,
[...] Perform Searches On Multiple Search Engines From Address Bar URL bar search is another handy Firefox add-on which makes searching easy with multiple search engines. If you use many search engines ( if you don’t, you should ) then this add-on is a must have for you. You can assign IDs for engines, like ‘ g ‘ for Google. Once, you have configured this add-on you can use it directly from the address bar. For example, to search a query on Google start your search with Google’s ID. Hence, if you have opted the ID ‘ t ‘ for twitter search and want to Original post by Perform Searches On Multiple Search Engines From Address Bar [...]
Watermelon! Said,
Watermelon! said: RT: URL bar search is another handy Firefox add-on which makes searching easy with multiple search engines.
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