| SusBlocker | | - | | |
| Stylus | | - | | |
| Stylish | | - | | |
| Styles Tuner | | - | | |
| Styler | | - | | |
| StyleRRR - Barebones Userstyle Injector | | - | | |
| Stop-it | | - | | |
| Stop SNS | | - | | |
| Stop All Ads | | - | | |
| Statusbar Charset | | - | | |
| Split Pannel | | - | | |
| Split Browser | | - | | |
| Snow | | - | | |
| Smooth East Asian Fonts | | - | | |
| Smart Zoom | | - | | |
| SmallWinFit | | - | | |
| SlyZoom | | - | | |
| SiteDelta | | - | | |
| Simple URL Blocker | | - | | |
| Simple Script Loader | | - | | |
| Simple Popup Blocker | | - | | |
| Simple Night Mode | | - | | |
| Simple Highlighter | | - | | |
| Simple Adblock | | - | | |
| Side｜Side | | - | | |
| Show Picture | | - | | |
| Show Anchors 2 | | - | | |
| Shift + Scroll (Horizontal Scrolling) | | - | | |
| Selected text reader | | - | | |
| Search term highlighter | | - | | |
| Search and Highlight | | - | | |
| Search ads cleanner | | - | | |
| Search Word Finder | | - | | |
| Scrolling headers | | - | | |
| Scroll to Top | | - | | |
| Scroll Zoom | | - | | |
| Scroll Progress New | | - | | |
| Scroll Progress | | - | | |
| Scriptish | | - | | |
| Screen Dimmer | | - | | |
| SaveURI | | - | | |
| Safe for Amoled | | - | | |
| Safari View Win | | - | | |
| Right Mouse + Mouse Wheel = Zoom Page | | - | | |
| Rewritify | | - | | |
| Restore Blink Tag | | - | | |
| RequestBlocker | | - | | |
| Request RegEx Filter | | - | | |
| Replaycer | | - | | |
| Replace | | - | | |