Hi Mwinston, could you try this:

Open your current Firefox settings (AKA Firefox profile) folder using either

• "3-bar" menu button > "?" button > Troubleshooting Information
• (menu bar) Help > Troubleshooting Information
• type or paste about:support in the address bar and press Enter

In the first table on the page, find the Profile Folder row and click the "Open Folder" button. This should launch a new window listing various files and folders in Windows Explorer.

The file you want to find is called prefs.js but please do not double-click it, that will execute the script. Instead, we want to open it in an editor. You could use a basic editor like Notepad, or a more powerful one like Microsoft Word. Either way, try right-click > Open With to choose the application.

In Notepad, you can use Edit menu > Find to look for lines containing extensions.procon which are the settings for the extension. (Find may be located on a different menu in other programs.)

The lists saved under extensions.procon.blacklist.sites and extensions.procon.whitelist.sites have the words separated by \n which represents a line break. To use these lists in another program, you most likely need to replace \n with an actual line break, which is not so easy in Notepad. If you have Microsoft Word, in the Replace dialog, you want to replace \n with ^p (paragraph break). If you do not have Word, there's probably another way to do it if it would take a long time to do it by hand.

I forgot to mention: do not save any changes to prefs.js, or your Firefox settings may get very messed up. Make sure if you modify the file to save your revised copy under a different name.