Nice addon, only 1 flaw Rated 4 out of 5 stars
People saying they have to reboot Firefox altogether are incorrect. But for the changes to stick you do indeed have to apply them twice, so I can understand why this misconception got started. I'm guessing most people are referring to having to change the cipher restriction to 128 and stronger, and uncheck the TLS 1.1 & 1.2 only box for many pages to load (doing this will make basically every site work btw). After making those changes and hitting "Apply Changes Now", then OK, and then refreshing the page... nothing changes. You have to go into those settings again, click Apply Changes Now again, then OK again, and then refresh the page yet again for the changes to stick. Then you're good to go. You do not have to restart Firefox. Fix this and the extension earns 5 stars in my book.
And personally I find the amount of sites that won't work with the settings maxed out over-exaggerated. I only have to do this with a few sites here and there. And if you max out the settings you should expect this. Blame the site, and not this addon for having lax encryption standards.
I like that the grading has high standards. It will encourage sites to enforce such standards as well. I wouldn't doubt some of the nasty reviews are by site admins feeling slighted by this. But it's for a greater good and Calomel shouldn't back off of this position.I've yet to see a site receive a perfect score under this new system. And it's always the "MAC" section lacking, grabbing an 8/20 at best, never have I seen better. But we shouldn't solve this problem by lowering our standards, but by improving our results.