| Result Preview | | - | | |
| Resume Video | | - | | |
| Resurrect Pages | | - | | |
| Resurrect Pages IsUp Edition | | - | | |
| Reverse Timeline | | - | | |
| Right Click DuckDuckGo | | - | | |
| S3.Google Translator | | - | | |
| SEO | | - | | |
| SafeBrowser | | - | | |
| SafeSearch Off | | - | | |
| Safelinking | | - | | |
| Safeshort | | - | | |
| Save Button for Pinterest | | - | | |
| Save My YouTube Day! | | - | | |
| Save To The Wayback Machine | | - | | |
| Save URL to Wayback Machine | | - | | |
| Scan Url with | | - | | |
| Scuttle | | - | | |
| Search By Image(by Google) | | - | | |
| Search Cloudlet | | - | | |
| Search Engine Favicons | | - | | |
| Search Everywhere | | - | | |
| Search Image Everywhere | | - | | |
| Search Image by Bing | | - | | |
| Search Site WE | | - | | |
| Search Slate | | - | | |
| Search Status Reloaded | | - | | |
| Search Youtube | | - | | |
| Search by Image | | - | | |
| Search by Image for Google | | - | | |
| Search in Language | | - | | |
| Search in Popup | | - | | |
| Search in YouTube | | - | | |
| Search media content | | - | | |
| Search menu for academics | | - | | |
| Search on Discogs | | - | | |
| Search the current site | | - | | |
| SearchMage | | - | | |
| SearchStatus | | - | | |
| SearchTweaker | | - | | |
| SearchWith | | - | | |
| Searchonymous | | - | | |
| Select Text and Request URL | | - | | |
| Select and translate | | - | | |
| SelectiveDict | | - | | |
| SeoQuake | | - | | |
| Series Searcher | | - | | |
| Shoptimate | | - | | |
| Short URL in one click - hsu.su | | - | | |
| Shortcut Keys for Google Search | | - | | |
