You should only see our payment page when you install AdBlock. If you are seeing it every time you open Firefox, or if AdBlock's options are changed back to the default settings every time you open Firefox, it means something is wrong. Something is returning AdBlock to its default, "just-installed" state every time you close Firefox. Here are some common reasons this can happen.
You're using a cookie, disk, or file cleaning program such as Ccleaner
Some system applications and browser extensions are designed to delete some of your browsing data when you close your browser. Ccleaner is one of the more well-known of these, but there are others. You may be using one that is deleting data that AdBlock needs to "remember" its settings between browsing sessions.
Make sure to tell the software not to remove "localStorage" files, because that's where AdBlock's settings are stored. For more information about which folder to exclude and how to exclude it, please consult the documentation for the software you're using.
You're subscribed to too many filter lists
Firefox offers a limited amount of memory available for add-ons to store their settings. Each filter list you subscribe to and every custom filter you add takes up some of that space. If you have too many, AdBlock will run out of storage space and be forced to discard whatever doesn't fit.
We recommend subscribing to no more than three or four filter lists. (Wondering which filter lists you really need?) We also suggest that you not enable AdBlock's advanced mode if you don't need advanced options, since that uses more storage space than basic mode.
Your Firefox preferences file or profile might have become corrupted
If you have tried the suggestions above or if you don't use a cookie cleaning application, it probably means that either your Firefox preference fie or profile or Firefox itself has become corrupted.
If you haven't already tried reinstalling AdBlock, do that now. As noted above, our payment page will open. If you don't want to pay for AdBlock at this time, just close the page.
If the problem continues to happen, try these Firefox troubleshooting steps.