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Lightning 2.6.1 bug solution Rated 3 out of 5 stars
I also experienced the same issue with 2.6.1 not working in the Linux enviroment with Thunderbird 24.0. As suggested I found and downloaded 2.6 and applied this downgrade to Thunderbird. It works fine now. My question here is HOW do I STOP it from updating... Each time I restart my system I find 2.6.1 re-installed. Is there some way like making the directory only writtable by root or something similar. Any help would be greatly appreciated.
added: 10/28 - Thanks for your help :)
Addons Manager -> Right click on Lightning -> Show More Information -> disable automatic updates