What are some popular web design plugins/extensions for browsers?

Several popular web design plugins and extensions for browsers can streamline the web design and development process, offering tools for debugging, testing, and optimizing websites. Here are some of the most widely used ones:

1. **Web Developer**: The Web Developer extension is available for Chrome and Firefox and offers a suite of tools for web development and design, including options for inspecting elements, editing CSS and HTML, testing responsive designs, and analyzing page performance.

2. **ColorZilla**: ColorZilla is a browser extension available for Chrome and Firefox that provides an eyedropper tool for quickly sampling and identifying colors from web pages. It also offers additional features such as a color picker, gradient generator, and palette browser.

3. **Lorem Ipsum Generator**: Lorem Ipsum Generator extensions, available for various browsers, generate placeholder text in the form of Lorem Ipsum for use in web design mockups and prototypes. These extensions offer customization options for generating different lengths and formats of placeholder text.

4. **Window Resizer**: Window Resizer extensions, such as Window Resizer for Chrome and Resize Window for Firefox, allow designers to test responsive designs by quickly resizing the browser window to common viewport sizes for various devices.

5. **WhatFont**: WhatFont is a browser extension available for Chrome and Safari that identifies and displays information about fonts used on web pages. It allows designers to inspect font properties, including font family, size, weight, and color.

6. **Ghostery**: Ghostery is a privacy-focused browser extension available for Chrome, Firefox, and other browsers that detects and blocks tracking scripts and other elements on web pages. It can be useful for web designers to identify and analyze third-party scripts and trackers on websites.

7. **Page Ruler**: Page Ruler extensions, such as Page Ruler for Chrome and MeasureIt for Firefox, provide on-screen rulers and guides for measuring and inspecting elements on web pages. They allow designers to accurately measure dimensions, margins, and padding of page elements.

8. **WAVE Evaluation Tool**: The WAVE Evaluation Tool extension, available for Chrome and Firefox, provides accessibility testing features for evaluating the accessibility of web pages according to WCAG standards. It identifies accessibility issues and offers suggestions for improving accessibility.

9. **JSON Formatter**: JSON Formatter extensions, available for various browsers, format and display JSON data in a human-readable format. They can be helpful for web designers working with JSON APIs and data.

10. **CSSViewer**: CSSViewer is a browser extension available for Chrome and Firefox that displays CSS properties of elements on web pages. It allows designers to quickly inspect and analyze CSS styles applied to individual elements.

These are just a few examples of popular web design plugins and extensions for browsers. Depending on your specific needs and workflow, there are many other useful extensions available for various browsers that can enhance your web design and development process.