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Windows 7: Prevent Apps From Auto Launching Browser (Pale Moon / Firefox)

13 Mar 2017   #1

Windows 7 Ultimate x64
Prevent Apps From Auto Launching Browser (Pale Moon / Firefox)

In Firefox/Pale Moon you can add the -profilemanager flag to your shortcut so that any time you launch it, before the browser actually runs it prompts you for a profile.

I like this a lot, it means I never get my browser opening unexpectedly. If I don't want to see the page being triggered by the installation/uninstallation of a third party program, (I just see a small 'Choose Profile' window) I just click Close and the browser doesn't open.

Problem is, some apps seem to access the executable directly and bypass the shortcut with the -profilemanager flag (probably via Default Programs setting).

So I started mucking about in the registry. I searched and modified any instance of palemoon.exe (or firefox.exe) that did not have anything to do with default icons, and added -profilemanager to the string.

It works, but I'm obviously adding the flag to too many registry keys, and it produces errors when trying to open http shortcuts I have on my Desktop.

Any chance someone might be willing to help me determine exactly which entries I need to modify to avoid getting errors?

Thanks in advance.

*Update : I think I've found all the right registry keys, but it's only working properly (no errors) in Win7 32bit. I'll post once I've had the time to get it working properly under W7-64.

My System SpecsSystem Spec

 Prevent Apps From Auto Launching Browser (Pale Moon / Firefox)

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