This is what happened after installing the Firefox Add-On:
Of course, I don’t have a Kindle …
That will likely happen in August, when the new all-touchy Kindle is available in brick and mortar stores. Unless Amazon makes it too fugly for me to ever want to buy.
I’ve been using the dotEPUB button. I’ll probably stop after having a Kindle.
With Readability now for Kindle, Kobo and Barnes & Noble need to ratchet it up some more.