how many web browser extensions are compatible with firefox?
Value
10
class entity
computer.web_browser_extension m.01dyhm
computer.web_browser_extension computer.web_browser
Web browser extension Firefox
count none
computer.web_browser_extension.works_on_web_browser
Works on web browser
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :computer.web_browser_extension . 
VALUES ?x1 { :m.01dyhm } 
?x0 :computer.web_browser_extension.works_on_web_browser ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND computer.web_browser_extension (JOIN computer.web_browser_extension.works_on_web_browser m.01dyhm)))