I am on a thunderbird v45-4-0 on windows 7 x64 On every mail, if I click the option to allow remote content, I see a very long list of options, as reported in the attached file. None of the 'allow remote content from moz-nullprincipal:{.................} do nothing if clicked. The same email, received on a iMac OS-X Sierra with the same version of thunderbird, display only 6 lines. Have you got some idea? Paolo By the way, upload an image loops: it seems to load but after reaching 100% the loading icon remains tuning foreverer, so I hope you have the image. If not, ask me and we'll find a way to send you in another way.