SearchPreview

The main feature of SearchPreview is to enhance your search results pages. It inserts site preview images (thumbnails), popularity ranks and sponsored links (where available) into Google™, DuckDuckGo™, Yahoo™ and Bing™ searches.
The main feature of SearchPreview (previously known as GooglePreview) is to enhance your search results pages. It inserts site preview images (thumbnails), popularity ranks (Google™ only) and sponsored links (where available and labeled "SearchPreview Sponsored Link") into Google™, DuckDuckGo™, Yahoo™ and Bing™ searches. Each feature can be individually disabled/enabled in the SearchPreview preferences area. The SearchPreview thumbnail system currently consists of 10 servers and generates over 15 TB of traffic per month.

https://addons.mozilla.org/en-US/fi.../searchpreview/

Search by Image - Reverse Image Search

Reverse image search using various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
Search by Image is a Firefox add-on which enables you to initiate a reverse image search from the right-click context menu or the browser toolbar. It finds all images positioned in the clicked area, including those declared in CSS. The add-on also supports uploading local images. On Android the context menu API is not available (1363016), use the extension from the toolbar instead.
The ongoing development of Search by Image is made possible thanks to the support of awesome backers. If you'd like to join them, please consider contributing with Patreon, PayPal or Bitcoin.

https://addons.mozilla.org/en-US/fi...earch_by_image/