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CloseDeveloper reply by Yvon Tanguy
Rated 5 out of 5 stars
Probably due to this bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1254752
Needs to be updated before it hits releases.
Options can't be changed, cookies can't be deleted.
The next release of CK will fix this issue. It should be available soon.
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