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Registry entry for default mailto: profile

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What changes do I need make to this Windows 10 registry entry to get TB to open up a compose window using a specific profile when I click on a mailto: link on a web page?

"C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe" -osint -compose -P  "%1" 

Here is the registry location: HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Mozilla Thunderbird\Protocols\mailto\shell\open\command. When I click on a mailto: link the TB profile manager opens up.

I use this command in a batch file to open up TB in normal fashion with the Mac 100 profile. "C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe" -P "Mac 100" Including "Mac 100" in the registry entry still causes TB to open in Profile Manager mode.

What changes do I need make to this Windows 10 registry entry to get TB to open up a compose window using a specific profile when I click on a mailto: link on a web page? "C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe" -osint -compose -P "%1" Here is the registry location: HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Mozilla Thunderbird\Protocols\mailto\shell\open\command. When I click on a mailto: link the TB profile manager opens up. I use this command in a batch file to open up TB in normal fashion with the Mac 100 profile. "C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe" -P "Mac 100" Including "Mac 100" in the registry entry still causes TB to open in Profile Manager mode.