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I have a custom add-on on my work Firefox. I set up Firefox sync to transfer it over to my laptop, however, my add-on still does not appear. How can I fix this?

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As mentioned in the question, I have a custom add-on I want on my other computer. According to your website, I should be able to transfer it effortlessly with Firefox Sync. What am I doing wrong or is there another way I can transfer my add-on to my personal laptop?

As mentioned in the question, I have a custom add-on I want on my other computer. According to your website, I should be able to transfer it effortlessly with Firefox Sync. What am I doing wrong or is there another way I can transfer my add-on to my personal laptop?

All Replies (5)

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It could be that add-ons are not included. Check your options on both computers. Also, if you can, just go to the add-on's web page from the other computer are install it directly.

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Unfortunately, the app is no longer available on the website. It's either my version or no version. For what it's worth, I do have the source code though. Any way to enter it in directly?

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Do you have the original XPI of this extension?

If that is the case then you can copy the file to the other computer (e.g. via an USB stick) and install the extension via "File (or Firefox > New Tab) > Open File".

Otherwise you can try to copy the installation folder of this extension in the extensions folder in the Firefox profile folder to the Firefox profile folder on the other computer.
You should see the ID of the extension on the "Help > Troubleshooting Information" page (about:support).

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That's a good idea. I'll try that and get back to you. I can just search by .xpi on the home machine right?

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Yes.

You can use this button to go to the Firefox profile folder:

  • Help > Troubleshooting Information > Profile Directory: Show Folder (Open Directory)

The "Application Data" folder in XP/Win2K and the "AppData" folder in Windows Vista and Windows 7 and later versions are hidden folders.