| HackTheWeb | | - | | |
| Hachima Go To Hell | | - | | |
| HTML Ruby | | - | | |
| GreyBackgrounds | | - | | |
| Greasemonkey | | - | | |
| Gray Font To Black Font | | - | | |
| Google Redesigned | | - | | |
| GlobalZoom | | - | | |
| GitHub Flavored Markdown (GFM) Viewer | | - | | |
| Gif Block | | - | | |
| Furigana Toggle | | - | | |
| Furigana Inserter | | - | | |
| Furigana Injector | | - | | |
| FreeStyler | | - | | |
| FrameExt | | - | | |
| Foxmosa | | - | | |
| FoxReplace | | - | | |
| FoxLingo | | - | | |
| Footnotify | | - | | |
| Font Replacer | | - | | |
| Font Contrast | | - | | |
| Font Changer | | - | | |
| Focus Indicator | | - | | |
| Flashblock | | - | | |
| FlashResizer | | - | | |
| Flash Killer | | - | | |
| Flash Game Maximizer | | - | | |
| Fixed Zoom | | - | | |
| FixScroll | | - | | |
| Fire IE | | - | | |
| Find in Page with Preview | | - | | |
| Find and replace | | - | | |
| Fierr | | - | | |
| Favicon Google icons | | - | | |
| Ez Reader | | - | | |
| ErrorZilla Plus | | - | | |
| ErrorZilla Mod | | - | | |
| Enter elements | | - | | |
| Enlight | | - | | |
| Element Hiding Helper for Adblock Plus | | - | | |
| Easy Read | | - | | |
| Easy Image Blocker | | - | | |
| EZ Show | | - | | |
| Dynamic Zoom | | - | | |
| Dublin Core Viewer | | - | | |
| Dr. Body Narrow | | - | | |
| Document Font Toggle | | - | | |
| Distractus | | - | | |
| Disable Style Button | | - | | |
| Disable CSS | | - | | |