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Sandboxie 5.33.2: Firefox button "Email link..." does not open Thunderbird anymore

Willy Tenner

Hi all SB-user!

I have a serious problem: The Firefox button "Email link..." does not open Thunderbird anymore. Firefox is sandboxed, Thunderbird is not sandboxed. This feature works without any problems with Googles Chrome and Pale Moon.

I have: Windows 10 Pro 1903 (18362.449) 64-Bit, Sandboxie 5.33.2, Firefox 68.5.0esr (64-bit) and Thunderbird 68.5.0 (64-bit).

When Firefox is startet outside the sandbox, "Email link..." opens the Thunderbird "New message" windows without any problems.

This is the Mozilla section of my sandboxie.ini config:

[Mozilla]

Enabled=y
ConfigLevel=7
AutoRecover=y
Template=Firefox_Force
Template=IExplore_History_DirectAccess
Template=IExplore_Favorites_RecoverFolder
Template=IExplore_Favorites_DirectAccess
Template=BlockPorts
Template=LingerPrograms
Template=Chrome_Phishing_DirectAccess
Template=Firefox_Phishing_DirectAccess
Template=AutoRecoverIgnore
Template=Firefox_Bookmarks_DirectAccess
Template=Thunderbird
RecoverFolder=%{374DE290-123F-4565-9164-39C4925E467B}%
RecoverFolder=%Personal%
RecoverFolder=%Desktop%
BorderColor=#00FFFF,off
NeverDelete=n
OpenFilePath=firefox.exe,%Tmpl.Firefox%\cert_override.txt
OpenFilePath=firefox.exe,%Tmpl.Firefox%\cert*.db
OpenFilePath=firefox.exe,%Tmpl.Firefox%\xulstore.json
OpenFilePath=firefox.exe,%Tmpl.Firefox%\prefs.js
OpenFilePath=firefox.exe,%Tmpl.Firefox%\search.json.mozlz4
OpenFilePath=firefox.exe,%Tmpl.Firefox%\parent.lock
OpenFilePath=firefox.exe,%Tmpl.Firefox%\browser-extension-data\*
OpenFilePath=firefox.exe,%UserProfile%\AppData\LocalLow\Mozilla\temp-*
OpenFilePath=firefox.exe,%Tmpl.Firefox%\extensions
OpenFilePath=D:\Downloads\
BoxNameTitle=-
CopyLimitKb=1077074
NotifyInternetAccessDenied=y
NotifyStartRunAccessDenied=y
AllowSpoolerPrintToFile=y
AutoDelete=y
OpenWinClass=thunderbird.exe,*

Any ideas?

Kind regards,

Willy

  • After fiddling around some hours I got two workarounds:

    1. Do not use Sandboxie anymore with the latest Firefox / Chrome / Iron / Chromium versions. They all have their own sandbox mechanisms.

    2. Sandboxie solution: Change the action of the MIME-type "mailto" and let point it to the installed 64-Bit version of Thunderbird:

    • Open Firefox (outside of sandboxie).
    • Menu|Options|General: Scroll down to "Applications"
    • Select content type "mailto" and in the pull-down menu select the action "Use other...". Another window "Select Helper Application" opens.
    • Browse... and select "C:\Program Files\Mozilla Thunderbird\thunderbird.exe", the 64-Bit version of Thunderbird.
    • Close Firefox and re-open it (this time inside of sandboxie!)
    • Have fun with sending links.

    If anybody has other or better solutions please drop your info here.

    Kind regards,
    Willy

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