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About this Add-on
OPIE2 is considered a 'legacy' extension and will no longer work with Firefox v57 and above. OPIE2 cannot be written with the WebExtensions platform that Mozilla has adopted for all extensions. OPIE2 will still be maintained, but only for Firefox clones (like Pale Moon).
This extension is a more advanced version of the OPIE (Ordered Preference Import/Export) extension. It allows for the import/export of any installed add-on's preferences. This is useful when installing extensions in a new profile, or synchronizing multiple Firefox installations.
Preferences are initially determined by OPIE2 by searching about:config for the most likely entries. The user can add/remove any or all of these preferences from the assigned list. OPIE2 also allows for the creation of user-defined preference packages that don't necessarily belong to a specific extension but are used to create a particular browser environment (i.e. for developers).