$ sqlite3 ~/.mozilla/firefox/[...]/search.sqlite 
SQLite version 3.6.10
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .dump
BEGIN TRANSACTION;
CREATE TABLE engine_data (id INTEGER PRIMARY KEY, engineid STRING, name STRING, value STRING);
INSERT INTO "engine_data" VALUES(1,'[app]/yahoo.xml','hidden',1);
INSERT INTO "engine_data" VALUES(2,'[app]/yahoo.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(3,'[app]/answers.xml','hidden',1);
INSERT INTO "engine_data" VALUES(4,'[app]/answers.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(5,'/usr/lib/firefox-3.0.11/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','hidden',1);
INSERT INTO "engine_data" VALUES(6,'/usr/lib/firefox-3.0.11/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(7,'[app]/creativecommons.xml','hidden',1);
INSERT INTO "engine_data" VALUES(8,'[app]/creativecommons.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(9,'[app]/amazondotcom.xml','hidden',1);
INSERT INTO "engine_data" VALUES(10,'[app]/amazondotcom.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(11,'[app]/eBay.xml','hidden',1);
INSERT INTO "engine_data" VALUES(12,'[app]/eBay.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(18,'/usr/lib/firefox-3.0.11/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','order',6);
INSERT INTO "engine_data" VALUES(22,'/usr/lib/firefox-3.0.12/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','hidden',1);
INSERT INTO "engine_data" VALUES(23,'/usr/lib/firefox-3.0.12/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','alias',NULL);
INSERT INTO "engine_data" VALUES(32,'/usr/lib/firefox-3.0.12/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','order',9);
INSERT INTO "engine_data" VALUES(33,'[app]/google.xml','order',1);
INSERT INTO "engine_data" VALUES(34,'[app]/yahoo.xml','order',2);
INSERT INTO "engine_data" VALUES(35,'[app]/wikipedia.xml','order',3);
INSERT INTO "engine_data" VALUES(36,'[app]/amazondotcom.xml','order',4);
INSERT INTO "engine_data" VALUES(37,'[app]/answers.xml','order',5);
INSERT INTO "engine_data" VALUES(38,'[app]/creativecommons.xml','order',6);
INSERT INTO "engine_data" VALUES(39,'[app]/eBay.xml','order',7);
INSERT INTO "engine_data" VALUES(40,'[app]/debsearch.src','order',8);
INSERT INTO "engine_data" VALUES(41,'/usr/lib/firefox-3.0.13/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','order',9);
INSERT INTO "engine_data" VALUES(42,'/usr/lib/firefox-3.0.13/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','hidden',1);
INSERT INTO "engine_data" VALUES(43,'/usr/lib/firefox-3.0.13/extensions/ubufox@ubuntu.com/searchplugins/ask.xml','alias',NULL);
COMMIT;