Add-ons using the techniques described in this document are considered a legacy technology in Firefox. Don't use these techniques to develop new add-ons. Use WebExtensions instead. If you maintain an add-on which uses the techniques described here, consider migrating it to use WebExtensions.
From Firefox 53 onwards, no new legacy add-ons will be accepted on addons.mozilla.org (AMO).
From Firefox 57 onwards, WebExtensions will be the only supported extension type, and Firefox will not load other types.
Even before Firefox 57, changes coming up in the Firefox platform will break many legacy extensions. These changes include multiprocess Firefox (e10s), sandboxing, and multiple content processes. Legacy extensions that are affected by these changes should migrate to WebExtensions if they can. See the "Compatibility Milestones" document for more.
A wiki page containing resources, migration paths, office hours, and more, is available to help developers transition to the new technologies.
SearchCallbacks are notified when the
AddonRepository search completes. If the search succeeded, then
searchSucceeded() is called and is passed an array of Addon objects that matched the search. Since these Addons are not actually installed, the AddonManager does not know about them. However, for each returned add-on, an AddonInstall object is created, which the AddonManager does know about. Each AddonInstall can be accessed through the Addon
install attribute, and is initially in the
STATE_AVAILABLE state. The array of Addons passed to
searchSucceeded() only includes add-ons that are compatible with the current application and are not already installed or being installed. The
AddonRepository is available for another search once one of the callback functions is called.
Called when a successful search completes.
void searchAddons( in Addon addons, in integer addonCount, in integer totalResults );
- Array of Addon objects representing the add-ons found by the search. The array represents a subset of the total add-ons available in the repository that match the search.
- The number of add-ons returned. Note,
addons.length == addonCount.
- The total number of results available in the repository.
Called when a search results in failure. A new search will immediately fail if
AddonRepository is completing another search request.