This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Returns a sidebar object, which contains several methods for registering add-ons with the browser.
The sidebar object returned has the following methods:
|Method||Description (SeaMonkey)||Description (Firefox)|
||Adds a sidebar panel.||Obsolete since Firefox 23 (only present in SeaMonkey).
End users can use the "load this bookmark in the sidebar" option instead. Also see Creating a Firefox sidebar.
||Adds a sidebar panel, which is able to work in the background.|
||Installs a search provider (OpenSearch). Adding OpenSearch search engines contains more details. Added in Firefox 2.|
Installs a search engine (Sherlock). Adding Sherlock search engines contains more details.
Note: This was made obsolete in Firefox 44, and has been removed completely in Firefox 59. You should use
||Indicates if a specific search provider (OpenSearch) is installed.|
Mozilla-specific. Not part of any standard.