| Reddit Submission Finder | | - | | |
| Reddit Opener | | - | | |
| Reddit Button | | - | | |
| Red Google Theme | | - | | |
| Read Hatebu Later | | - | | |
| Ratings Preview for YouTubeTM | | - | | |
| RapidIMG.org Image Uploader | | - | | |
| RapidFox | | - | | |
| RankJIT | | - | | |
| RandomReddit | | - | | |
| Rakuten Instant Link | | - | | |
| Rakuten Checkbox OFF | | - | | |
| Rajiko | | - | | |
| Rain Alarm Extension | | - | | |
| Radio Search | | - | | |
| Radikox | | - | | |
| RYM Enhancer | | - | | |
| QuickWiki | | - | | |
| Quick translator | | - | | |
| Quick translate from context menu | | - | | |
| Quick Translator | | - | | |
| Quick Response fox | | - | | |
| Quick Google Translate | | - | | |
| Quick Dictionary | | - | | |
| Quick Code | | - | | |
| QRSrc | | - | | |
| QRLink Maker | | - | | |
| QR Decoder | | - | | |
| QR Code Image Generator | | - | | |
| Px Downloader | | - | | |
| Pushbullet | | - | | |
| Proxy List | | - | | |
| Proxy 1-Click | | - | | |
| Print Friendly ＆ PDF | | - | | |
| Preview Peek for Google | | - | | |
| Prefsearch | | - | | |
| Powerbot for Gmail | | - | | |
| Popup Video(WebExtension) | | - | | |
| Popup Play | | - | | |
| PlugIn-Checker | | - | | |
| Play／Pause | | - | | |
| Pixlr | | - | | |
| PictureFox | | - | | |
| Picture Zoom Plus(+) | | - | | |
| PictuTools | | - | | |
| Picmasa Uploader | | - | | |
| PicStorage.eu | | - | | |
| PicRange Rightclick Extension | | - | | |
| PiP Video | | - | | |
| Photozou Uploader | | - | | |