Comment by SwellJoe

I've been using SuperGenPass for this for years. There is a Chrome extension that is safe (from website snooping of your key) and a browser bookmarklet that is not safe. But, I just use the mobile browser version in another tab and copy paste since I choose to use Firefox. It's a little less convenient, but not inconvenient enough that I've spent time trying to figure out how to make a safe extension for Firefox.

So, what's different about this from the SuperGenPass session Chrome plugin?