(adsbygoogle = window.adsbygoogle || []).push({}); will the e3 flasher work with every firmware or just up to a certain one?

If I'm correct as I'm not fully sure you could downgrade it to any firmware you wanted so long as you had correct files and such. But it's used to jailbreak.

no im asking if i could bassically downgrade from the latest public firmware without having a problem i know how the e3 flasher works i just havent use it in a while and i was wondering if its been patched

It can't be patched. Yes it works 100%.