| FoxyProxy | | - | | |
| FoxyPAC | | - | | |
| FormFox | | - | | |
| Force-TLS | | - | | |
| FlashGot | | - | | |
| Flash Video Downloader - Youtube Downloader | | - | | |
| Flagfox | | - | | |
| Flag ＆ IP Address ＆ Domain WHOIS Info | | - | | |
| Firefox DNS Flusher | | - | | |
| FireTorrent | | - | | |
| FireProxy | | - | | |
| FirePreview | | - | | |
| FireFTP | | - | | |
| FireDownload | | - | | |
| Feel the Link | | - | | |
| Fast Video Download | | - | | |
| Extended Statusbar | | - | | |
| Expiry Canary | | - | | |
| Enforce Encryption | | - | | |
| Embedded Objects | | - | | |
| Email Extractor | | - | | |
| Elite Proxy Switcher | | - | | |
| Drupal Version Check | | - | | |
| DownloadsInMenubar | | - | | |
| Downloads sidebar | | - | | |
| Downloads in a Tab | | - | | |
| Downloads Window | | - | | |
| Downloads Toolbar Button | | - | | |
| DownloadHelper | | - | | |
| Download status | | - | | |
| Download on arrow panel | | - | | |
| Download all Images | | - | | |
| Download Youtube Videos + | | - | | |
| Download With - | | - | | |
| Download Unlimited | | - | | |
| Download Statusbar (973988) | | - | | |
| Download Statusbar | | - | | |
| Download Status Button | | - | | |
| Download Status Bar | | - | | |
| Download Star | | - | | |
| Download Sound | | - | | |
| Download Sort | | - | | |
| Download Scheduler | | - | | |
| Download Plan | | - | | |
| Download Panel Tweaker | | - | | |
| Download Panel | | - | | |
| Download Nubs | | - | | |
| Download Manager Tweak | | - | | |
| Download Links | | - | | |
| Download Flash and Video | | - | | |