Here's a description of the spec, if you are interested: https://developer.mozilla.org/en-US/docs/Web/OpenSearch https://developer.mozilla.org/en-US/docs/Web/Op

Here's a description of the spec, if you are interested: https://developer.mozilla.org/en-US/docs/Web/OpenSearch https://developer.mozilla.org/en-US/docs/Web/OpenSearch Firefox uses it to populate the search bar drop down menu with the available search engines for a site, but it does not add them automatically like Chrome does.