Forum LiberKey

That's it, Your proxy dones not allow to download .exe without an explicit click on the web page.

In order to workrounded that, please proceed to offline installation and follow instructions:
- Download official Thunderbird Setup from mozilla or from our mirrors
- Download LKS (offline installation) of Thunderbird
- Copy LKS file whereever you want
- Create following subfolders (where you previously saved the LKS files) : Thunderbird_31.2.0_Setup\de\
- Copy/move setup file into created folder (Thunderbird_31.2.0_Setup\de\)
- Run the LKS and proceed to the offline installation of Thunderbird

Use same way for Firefox.

I have tried it right now

this way it work

Thanks a lot