Firefox add-on with keyword - online
Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.
There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.
To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.
![PDF editor online](https://addons.mozilla.org/user-media/addon_icons/774/774033-64.png?modified=1523787623)
#1, PDF editor online
![PDF editor online](https://addons.mozilla.org/user-media/addon_icons/774/774033-64.png?modified=1523787623)
![Avast Online Security & Privacy](https://addons.mozilla.org/user-media/addon_icons/473/473816-64.png?modified=dc2d6fb5)
#2, Avast Online Security & Privacy
![Avast Online Security & Privacy](https://addons.mozilla.org/user-media/addon_icons/473/473816-64.png?modified=dc2d6fb5)
![Docs Online Viewer](https://addons.mozilla.org/user-media/addon_icons/372/372905-64.png?modified=1454944816)
#3, Docs Online Viewer
![Docs Online Viewer](https://addons.mozilla.org/user-media/addon_icons/372/372905-64.png?modified=1454944816)
![AVG Online Security](https://addons.mozilla.org/user-media/addon_icons/2299/2299582-64.png?modified=c8002f55)
#4, AVG Online Security
![AVG Online Security](https://addons.mozilla.org/user-media/addon_icons/2299/2299582-64.png?modified=c8002f55)
![Free Android online emulator ApkOnline](https://addons.mozilla.org/user-media/addon_icons/985/985791-64.png?modified=963ebcb1)
#5, Free Android online emulator ApkOnline
![Free Android online emulator ApkOnline](https://addons.mozilla.org/user-media/addon_icons/985/985791-64.png?modified=963ebcb1)
![File Converter - By Online-Convert.com](https://addons.mozilla.org/user-media/addon_icons/306/306836-64.png?modified=1551084107)
#6, File Converter - By Online-Convert.com
![File Converter - By Online-Convert.com](https://addons.mozilla.org/user-media/addon_icons/306/306836-64.png?modified=1551084107)
![Karma | Online shopping, but better](https://addons.mozilla.org/user-media/addon_icons/1006/1006390-64.png?modified=21485ae9)
#7, Karma | Online shopping, but better
![Karma | Online shopping, but better](https://addons.mozilla.org/user-media/addon_icons/1006/1006390-64.png?modified=21485ae9)
#8, online
![Online Tools by 10015.io](https://addons.mozilla.org/user-media/addon_icons/2689/2689482-64.png?modified=01135d3a)
#9, Online Tools by 10015.io
![Online Tools by 10015.io](https://addons.mozilla.org/user-media/addon_icons/2689/2689482-64.png?modified=01135d3a)
#10, SAO-Sword Art Online
![Online Dictionary Helper](https://addons.mozilla.org/user-media/addon_icons/1472/1472507-64.png?modified=eff73ed0)
#11, Online Dictionary Helper
![Online Dictionary Helper](https://addons.mozilla.org/user-media/addon_icons/1472/1472507-64.png?modified=eff73ed0)
![Online Weather Forecast](https://addons.mozilla.org/user-media/addon_icons/2844/2844285-64.png?modified=d8437ca7)
#12, Online Weather Forecast
![Online Weather Forecast](https://addons.mozilla.org/user-media/addon_icons/2844/2844285-64.png?modified=d8437ca7)
![WhatsApp Online Monitor](https://addons.mozilla.org/user-media/addon_icons/2633/2633831-64.png?modified=dfc3fa97)
#13, WhatsApp Online Monitor
![WhatsApp Online Monitor](https://addons.mozilla.org/user-media/addon_icons/2633/2633831-64.png?modified=dfc3fa97)
![ChatGPT Online for Google](https://addons.mozilla.org/user-media/addon_icons/2786/2786736-64.png?modified=100db48f)
#14, ChatGPT Online for Google
![ChatGPT Online for Google](https://addons.mozilla.org/user-media/addon_icons/2786/2786736-64.png?modified=100db48f)
![Insight - Track Your Time Online](https://addons.mozilla.org/user-media/addon_icons/2601/2601702-64.png?modified=fa6654ed)
#15, Insight - Track Your Time Online
![Insight - Track Your Time Online](https://addons.mozilla.org/user-media/addon_icons/2601/2601702-64.png?modified=fa6654ed)
![Web Telegram Online](https://addons.mozilla.org/user-media/addon_icons/2710/2710958-64.png?modified=bd90f516)
#16, Web Telegram Online
![Web Telegram Online](https://addons.mozilla.org/user-media/addon_icons/2710/2710958-64.png?modified=bd90f516)
![Gimp online image editor](https://addons.mozilla.org/user-media/addon_icons/771/771525-64.png?modified=1523103624)
#17, Gimp online image editor
![Gimp online image editor](https://addons.mozilla.org/user-media/addon_icons/771/771525-64.png?modified=1523103624)
![Firefox Multi-Account Containers](https://addons.mozilla.org/user-media/addon_icons/782/782160-64.png?modified=mcrushed)
#18, Firefox Multi-Account Containers
![Firefox Multi-Account Containers](https://addons.mozilla.org/user-media/addon_icons/782/782160-64.png?modified=mcrushed)
![Video editor OpenShot online](https://addons.mozilla.org/user-media/addon_icons/785/785302-64.png?modified=1523103624)
#19, Video editor OpenShot online
![Video editor OpenShot online](https://addons.mozilla.org/user-media/addon_icons/785/785302-64.png?modified=1523103624)
![DanfeOnline - Gerador de DANFE](https://addons.mozilla.org/user-media/addon_icons/2696/2696373-64.png?modified=107ed76a)
#20, DanfeOnline - Gerador de DANFE
![DanfeOnline - Gerador de DANFE](https://addons.mozilla.org/user-media/addon_icons/2696/2696373-64.png?modified=107ed76a)
![OpenOffice Excel online for xls spreadsheets](https://addons.mozilla.org/user-media/addon_icons/789/789072-64.png?modified=1524205224)
#21, OpenOffice Excel online for xls spreadsheets
![OpenOffice Excel online for xls spreadsheets](https://addons.mozilla.org/user-media/addon_icons/789/789072-64.png?modified=1524205224)
![Tomato Clock](https://addons.mozilla.org/user-media/addon_icons/627/627490-64.png?modified=mcrushed)
#22, Tomato Clock
![Tomato Clock](https://addons.mozilla.org/user-media/addon_icons/627/627490-64.png?modified=mcrushed)
![Office online OfficeWork for XLS DOC and PPT](https://addons.mozilla.org/user-media/addon_icons/829/829647-64.png?modified=1499102420)
#23, Office online OfficeWork for XLS DOC and PPT
![Office online OfficeWork for XLS DOC and PPT](https://addons.mozilla.org/user-media/addon_icons/829/829647-64.png?modified=1499102420)
![Video converter online VideoConvertPlus](https://addons.mozilla.org/user-media/addon_icons/954/954665-64.png?modified=316507f6)
#24, Video converter online VideoConvertPlus
![Video converter online VideoConvertPlus](https://addons.mozilla.org/user-media/addon_icons/954/954665-64.png?modified=316507f6)
![OpenOffice Writer online documents](https://addons.mozilla.org/user-media/addon_icons/773/773828-64.png?modified=1524162023)
#25, OpenOffice Writer online documents
![OpenOffice Writer online documents](https://addons.mozilla.org/user-media/addon_icons/773/773828-64.png?modified=1524162023)