Using Google Translator
Considering that Firefox blocks cross-site cookies by default and for certain reasons "may interfere with some websites" ALL third-party cookies are not blocked, but if when we close Firefox the third-party cookies will be deleted, I think it's a good idea for privacy reasons and for the sites to work
I know there are some prefs for this:
but it would be better to have them enabled by default
and if it really messes up some sites or for questions of ad preferences, consider using cookie exceptions
Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.
I am unable to use my internet British Bank until I remove all cookies from Firefox.
Rather than clearing 3rd-party cookies after every session we have opted for isolating them between sites via Total Cookie Protection. This provides strong cross-site protection while still maintaining good compatibility with websites. Clearing cookies may break sites.
You're right in that we do make exceptions when we detect certain behaviors like login-flows (which require cross-site cookies). If you don't like these exceptions you can turn all of it off via the `privacy.antitracking.enableWebcompat` pref. However, note that this disables all of our web compatibility features - it may cause websites to break!
If you're curious, here is a detailed technical description of our Total Cookie Protection exceptions / heuristics.