Svelte Dev Tools: An extension that allows inspection of Svelte component hierarchy and state in the Firefox and Chrome developer tools.
React Developer Tools: React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more.
Wappalyzer: A cross-platform utility that uncovers the tech used on websites. It detects CMS, ecommerce platforms and web frameworks server software, analytics and much more.
Firefox Multi-Account containers: This lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities.
Facebook Container: Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
Measure-It: Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
WAVE accessibility tool: Evaluate web accessibility within the Firefox browser. When activated, the WAVE extension injects icons and indicators into your page to give feedback about accessibility and to facilitate manual evaluation.