| Print Friendly ＆ PDF | | - | | |
| Proxy 1-Click | | - | | |
| Proxy List | | - | | |
| Pushbullet | | - | | |
| Px Downloader | | - | | |
| QR Code Image Generator | | - | | |
| QR Decoder | | - | | |
| QRLink Maker | | - | | |
| QRSrc | | - | | |
| Quick Code | | - | | |
| Quick Dictionary | | - | | |
| Quick Google Translate | | - | | |
| Quick Response fox | | - | | |
| Quick Translator | | - | | |
| Quick translate from context menu | | - | | |
| Quick translator | | - | | |
| QuickWiki | | - | | |
| RYM Enhancer | | - | | |
| Radikox | | - | | |
| Radio Search | | - | | |
| Rain Alarm Extension | | - | | |
| Rajiko | | - | | |
| Rakuten Checkbox OFF | | - | | |
| Rakuten Instant Link | | - | | |
| RandomReddit | | - | | |
| RankJIT | | - | | |
| RapidFox | | - | | |
| RapidIMG.org Image Uploader | | - | | |
| Ratings Preview for YouTubeTM | | - | | |
| Read Hatebu Later | | - | | |
| Red Google Theme | | - | | |
| Reddit Button | | - | | |
| Reddit Opener | | - | | |
| Reddit Submission Finder | | - | | |
| Reddit on Youtube | | - | | |
| Reddit-Liquid-Streams | | - | | |
| RedditInfinity | | - | | |
| RedditNotifier | | - | | |
| Reddited | | - | | |
| Redirect Bypasser | | - | | |
| Redirect Check Client | | - | | |
| Redirect to DuckDuckGo | | - | | |
| Regchan Firefox Plugin | | - | | |
| Remember The Milk for Gmail | | - | | |
| Remove Cookie for Google Account Chooser | | - | | |
| Remove Google Tracking | | - | | |
| Remove Google Tracking for Copy | | - | | |
| Remove Yahoo Tracking | | - | | |
| Replace Translator | | - | | |
| Result Preview | | - | | |
