Opera Software is a leading provider of fast, secure, and user-friendly browser solutions. The Opera Sidebar Action API supports the addition of actions in the sidebars of browsers. This particular API requires the onwards of Opera 30. Opera mainly supports the Navigator Extension (NEX) file format for browser extensions.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.