To me, that's in the territory where anyone who was mulling biz-name ideas over could probably come up with something equally as good for $15. And if I were considering a prefix I'd probably lean towards i vs e. And I'd prefer the singular over the plural. So it doesn't really move me.
That being said, there is an existing biz on eFirms.ca. And iFirm is reg'd but undeveloped. And iFirms is available...