why is the word everytime marked by firefox's spell checker (it even marks firefox as a wrong spelling)?

Question

it suggests that i use every time instead of everytime and Firefox for firefox (silly me, its a proper noun haha!) well. my question is, isnt everytime a word? im confused

Answer 1

This is because Firefox was designed by someone who couldn't spell. It is a common problem concerning modern spellcheck programmes. (note: not, programs)

Answer 2

everytime is not a word, you want the two words every time