OPIE is an extension to Firefox browser that helps you to import or export all installed extension preferences. This is very useful in many situations, for instance, when re-installing Firefox browser, creating a new profile or synchronizing multiple Firefox installation, it is useful to restore your old extension preferences.

The extension is easy to use. To export, click on export button, then "Browse" button to select a directory where the exported preferences will be stored. The "Get list" button retrieves a list of all extensions that OPIE knows about. This list is displayed in the text area along with checkboxes to select which extension preferences to export.

To import, Click on Import button, then "Browse" button to bring up files. Here you may select one or more exported preference files that were previously created with the OPIE export function. Double click to open a single file. Multiple files can be opened using the SHIFT-CLICK and CTRL-CLICK methods. The top text area will display the selected files.