Open Graph Preview
Shows approximately what users will see if this webpage is shared on websites that uses OG tags to display a preview. Let you detect if no Open Graph Tags are set on your webpage ! The shown preview is inspired from the Facebook one.
1.328 users
Locale Switcher
Lets you quickly switch the browser locale to test localization on your website.
1.304 users
Flash Debugger
Debug Flash/SWF/Flex files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Profile memory consumption and much much more...
1.301 users
Self-Destructing Cookies (WebEx)
Delete cookies when browser is closed or once the tab is closed to prevent possible trackings (similar to Ove's Self-Destructing Cookies which is not compatible with FF57 anymore)
1.291 users
JWT Debugger
The JWT.io debugger as a Web Extension
1.289 users
博达网站群扩展插件
适应Firefox新版机制,完成浏览器对于网站群管理平台原来扩展插件的支持。
1.286 users
LiveHosts
Switch your host/IP mappings in real time without editing your hosts file
1.282 users
OpenLorem
Lorem Ipsum filler text for web developers. Uses Loripsum, Bacon Ipsum and Dino Ipsum APIs to retrieve customized text. Insert into fields using context menu. Source code is available on Github.
1.274 users
Scrum for Trello
Scrum for Trello adds functionality to the awesome trello.com for use in Scrum projects. Add estimates or record time-spent directly on Trello cards. Shows sums at the top of each list and the top right corner of each board.
1.271 users
TrashMail.com for Mozilla Firefox®
Create free disposable email addresses and paste them directly in forms. This helps to protect you from spam mails and could be useful when subscribing to forums or newsletters...
1.270 users
Multiple Search and Highlight
Highlight multiple words separated by comma, space or arbitrary separator with regular expression support
1.257 users
PX: Viewport Dimensions
Displays the viewport dimensions when a browser window is resized.
1.256 users
Responsively Helper
An extension to open current browser page in Responsively app
1.255 users
BugHerd: Visual Feedback Tool for Websites
Screenshots for the point and click bug tracker
1.251 users
Free OpenVPN Server Finder
Display up-to-date list of public OpenVPN servers provided by VPN Gate (University of Tsukuba)
1.247 users
SAML Message Decoder
This tool helps you debug your SAML based SSO/SLO implementations. It runs in the background, collecting SAML messages as they are sent and received by the browser.
1.243 users
Web Developer Form Filler
This extension is used by developers to make it easy to save and fill forms for use in submission testing and validation.
1.237 users
Siteimprove Accessibility Checker
Jumpstart your web accessibility efforts directly in Firefox. Is your web page accessible for everyone? Assess the accessibility of your web pages conveniently in Mozilla Firefox browser with the Siteimprove Accessibility Checker.
1.235 users
ChatGPT-4 for Google & AI Image Generator
ChatGPT for Google, Bing includes AI Image Generator. Chat with ChatGPT when you search🔍 and Generate AI images.🖼️
1.227 users
Debug CSS
Adds outline to all elements on the page to show the culprit element which is changing desired layout hit `Alt+Shift+C ` key to toggle the extension
1.225 users
View Source
View Source button to easily open up View Source tab for the web page.
1.218 users
Save to Trello
This firefox extension allows you to Create a Trello card from any webpage (including Gmail/webmail) / Ideal for Inbox Zero. You can save the current page to Trello. When you find something in Firefox that you want to view later put it in Trello.
1.215 users
Reload Skip Cache Button
Reload page without using content stored in the browser cache to make sure you get any updates.
1.206 users
Swagger UI
Swagger-UI für Firefox
1.196 users
Display #Anchors
Displays anchors for all content in the current web page without breaking the layout.
1.193 users