

Then use Find (Command+f) to search for some part of the name of the unwanted extension, and you should see various information about it. * (menu bar) Tools > Web Developer > Scratchpad * "3-bar" menu button > Developer > Scratchpad You can close out of the Finder window after that. Scroll down and find '''extensions.json''' and make a copy somewhere convenient, such as your Documents folder or Desktop.

* type or paste about:support in the address bar and press Enter/Return
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* (menu bar) Help > Troubleshooting Information * "3-bar" menu button > "?" button > Troubleshooting Information Here's a somewhat roundabout way to look in that file: To find the file, you can research the location in a Firefox settings file named '''extensions.json'''.
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The next time you quit Firefox and start it up again, it should discover that the extension is gone and update extensions.json accordingly. Note: you don't need to save the changes to the file when you close the Scratchpad unless you want to keep the "pretty" version for future reference. You can use Finder to locate and remove the extension file. (On Windows, the \ in folder paths is doubled in this file due to the way it is processed. The descriptor gives its location on disk. Then use Find ( Command+f) to search for some part of the name of the unwanted extension, and you should see various information about it. Use the Open button on the Scratchpad's toolbar to open the backup copy you made of extensions.json and then click the Pretty Print button on the toolbar to re-layout the data in a more readable format.

In the first table on the page, click the "Show in Finder" button.
