Doesn't work with 67.0.1 (64-bit) version.
While opening "Manage All Cookies" the list of domains is empty.
Answer from the author:
Go to the add-ons page, click on the "Cookie Quick Manager" add-on to get to the details page for the add-on, scroll down to the part that says "Run in Private Windows" and select the "Allow" option.
Until I did this the "All" context would not show anything and some of the other contexts would also be missing cookies. I assume this is because when it tried to enumerate all the cookies, it would hit the "private" cookies and was denied access and instead of just continuing it would halt/crash the add-on.

opt-out of ads speeds up WWWeb somewhat !

http://www.youronlinechoices.com/de/praferenzmanagement/
https://www.optimizely.com/legal/opt-out/

just disable all domains there so you get 130+ opt-out cookies.

with these in place and google analytics opt-out add-on Websurfing speeds up noticeably even with uBlock in place.

save + restore (or protect from pristine profile) the opt-out cookies for fast web.

there isnt ability set any cookie read only like Cookiemanager+

WHO KNOWS what Mozilla was thinking when they took a step *backwards* in terms of empowering users to manage their own Security & Privacy by removing the ability to View Individual Cookies... but the up-side is that it caused me to discovered THIS add-in, which is *infinitely better* than Firefox's old built-in features.

Ten minutes with this app and I've already learned a bunch of stuff I didn't realize before, in terms of who's tracking me how/where/when, PLUS the ability to modify your cookies so that you're sharing what you want to, when you want to.

Now all I need in an in-depth tutorial about different types of cookies, pros/cons, and so on.

Great job Ysard, thank you.

The best cookie manager I have tested (and I have tested a lot, if not them all!) The pop-up menu shows all the expected options for quick use (find and delete), plus, it also has a convenient option to delete Local Storage, what can be really handy (in a quick glance, it informs if the site is using local memory, giving the option to clear it).

Great extension, very well done. I noticed a recent change: for cookies that are in a Firefox container, the container icon no longer appears. It used to be just to the left of the number of cookies for the site, in the Domains column - ?

it does exactly what I expect

The addon works perfectly but IMHO it lacks one option. I want to delete cookies from some sites forever with one option called as example Delete+blacklist or similar. Please try to add it to the extension and it will be perfect.