Yeah, it's 1MB if you already have xulrunner installed. If you don't, get ready for the 11MB install. Just removing Fennec won't remove xulrunner. You have uninstall it separately.

Anyway, I won't test it. No more room on my internal and I don't want to uninstall anything at this time. Once the install has been cutdown a bit, I'll download and install. Until then, Tear and MicroB will power my device.

Jesse~