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How to disable OS version check?

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Mozillian
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How to disable OS version check?

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Mozilla Firefox, Portable Edition | PortableApps.com
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Firefox 116 and later requires Windows 10 or later. Would you like to download Firefox Legacy 115?
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Yes No
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I encountered an error above when attempting to launch FirefoxPortable 125.0.1 on Windows 7. While it's known that Firefox no longer supports Windows 7 from version 116 onwards, there are workarounds like VxKex that allow these newer versions to function smoothly on such operating systems. In fact, I currently have Firefox 125.0.1 (the installed version) running successfully on both my test Windows 7 and 8.1 machines.

However, I'm interested in running the PortableApps version of Firefox for various reasons on these older operating systems. I just need guidance on disabling the compatibility check from the PortableApps launcher. Is there a .ini tweak or some other method available for this? If not, could you please consider incorporating it into the next version?

Thank you

John T. Haller
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Updated Launcher

It'll need an updated launcher. I put one together to test.

  1. Download FirefoxPortableDisableOSCheck_2.7.6.zip.
  2. Backup your FirefoxPortable folder.
  3. Unzip the contents of that ZIP to your FirefoxPortable folder
  4. If you don't already have a FirefoxPortable.ini directly in your FIrefoxPortable folder next to FirefoxPortable.exe, copy the sample one from FirefoxPortable\Other\Source to FirefoxPortable.
  5. Edit the file and set DisableOSCheck=true and then save it.

This should give you what you'd like. I tested it on Windows 7 x64 with VxKex and it is working as expected.

Sometimes, the impossible can become possible, if you're awesome!

Mozillian
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Working great!

Working great!

Thank you very much for the fast solution!

John T. Haller
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Now Included

As of Firefox Portable 125.0.2, this option is now included in the stable release.

Sometimes, the impossible can become possible, if you're awesome!

John T. Haller
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Enabled in All Channels

With today's Beta, Dev, and Nightly releases, this feature is now enabled and documented in all channels.

Sometimes, the impossible can become possible, if you're awesome!

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