SQLite Manager Vereist herstart

Manage any SQLite database on your computer.

Waardering 4 van 5 sterren (80)
142.128 gebruikers

RESTClient, a debugger for RESTful web services. Vereist herstart

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Waardering 4 van 5 sterren (105)
130.948 gebruikers

IE Tab Vereist herstart

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Waardering 4 van 5 sterren (1.224)
125.904 gebruikers

Selenium IDE Vereist herstart

Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests.

Waardering 3 van 5 sterren (34)
119.296 gebruikers

Nimbus Screen Capture - editable screenshots

1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
4) Slack direct upload (NEW!)
Edit screenshots and save images as local file or Google Drive. Annotate screenshots with different tools. Upload and share!

Waardering 4 van 5 sterren (343)
114.536 gebruikers

Emoji Keyboard Compatibel met Firefox 57+ Aanbevolen

A free extension of the web tool https://emojikeyboard.org. It helps input emoji in the web browser with an extensive search functionality.

Waardering 4 van 5 sterren (70)
111.823 gebruikers

Image Zoom Vereist herstart

Adds zoom and rotation functionality for images...

Waardering 4 van 5 sterren (341)
98.802 gebruikers

Screengrab (fix version) Vereist herstart

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Waardering 5 van 5 sterren (259)
98.340 gebruikers

MeasureIt Vereist herstart

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Waardering 4 van 5 sterren (362)
95.530 gebruikers

FirePath Vereist herstart

FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors (Sizzle selector engine).

Waardering 4 van 5 sterren (25)
92.700 gebruikers

HttpRequester Vereist herstart

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Waardering 4 van 5 sterren (66)
91.213 gebruikers

Live HTTP Headers Vereist herstart

View HTTP headers of a page and while browsing.

Waardering 4 van 5 sterren (175)
90.345 gebruikers

Modify Headers Vereist herstart

Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.

Waardering 4 van 5 sterren (77)
89.628 gebruikers


Bekijk JSON-documenten in de browser.

Waardering 5 van 5 sterren (177)
89.151 gebruikers

Text Link Vereist herstart

Allows URI texts written in webpages to be loaded by double clicks.

Waardering 4 van 5 sterren (289)
86.310 gebruikers

Cookies Manager+ Vereist herstart

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Waardering 5 van 5 sterren (73)
85.974 gebruikers

JavaScript Debugger Vereist herstart

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Waardering 4 van 5 sterren (50)
85.208 gebruikers

ipFood Vereist herstart Aanbevolen

Simulate the use of a series of proxy changing at each new connection.

Waardering 4 van 5 sterren (10)
83.945 gebruikers

Remote XUL Manager

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Waardering 5 van 5 sterren (37)
78.805 gebruikers


A very simple extension for learning web page colors. Copy the RGB or Hex color code of any pixel displayed in your browser to the clipboard (in CSS/HTML format). Similar in function to Internet Explorer's color picker.

Waardering 4 van 5 sterren (47)
74.587 gebruikers