Enter a keyword in the address bar of the Firefox browser and press enter to use the search engine.

Procedure:
Enter "about: config" in the address bar of the browser and press Enter.
Enter keyword in the filter, find the keyword. url item, and change it to your own custom search engine.
For example, my Google Custom Search engine:
Http://www.google.com/custom? Cx = 000338991635130608122% 3aatxw70sopsq & COF = Ah % 3 Aleft % 3 balc % 3A % 23366cc % 3 bbgc % 3A % 23 ffffff % 3bcx % 3 ahacking % 2520 search % 2520 engine % 2520% 3 bdiv % 3A % 230066ff % 3 bforid % 3a1% 3 bgalt % 3A % 23009900% 3 bgfnt % 3A % 23009900% 3 bgimp % 3A % 23009900% 3bl % 3 ahttp % 3A % 2f % 2fclin003% 2 ECOM % 2 Fico % 2 filogfhack % 2 egif % 3blc % 3A % 23366cc % 3blh % 3A0% 3blp % 3a1% 3bs % 3 ahttp % 3A % 2f % 2fclin003% 2 ECOM % 2f % 3bt % 3A % 23000000% 3 bvlc % 3A % 23660000% 3B & HL = en & SA = SEARCH & adkw = AELymgW1MAgcODBBe3oHtaBFujSUTac2oz2G92r6fgMmjvXQHL1x08vK7cPJTW8eqlSYG2wtXX1Vvkt7BFVQ76yFrN1xJ1eLdvVUDcWDX4F4vhc8reuriVq9X6qaxKO5-9lkbjfmfQoN4HpzQ5nq12pV8EIWhiy0oKKtO1cRrbAbvhlR1WzCbOM & client = pub-3938365705781251 & channel = 6572727187 & Q =
Ensure that the value of keyword. enabled is true.

:

For more information, see http://blog.csdn.net/clin003/or http://wiki.mygou.com/