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Customizing Firefox for accessibility testing

From: Web Accessibility Principles

Video: Customizing Firefox for accessibility testing

>> Now that we've downloaded Firefox there are a number of extensions that you can add to it for testing the accessibility of your web sites. The four extensions that we are going to add are named Web Developer, Firefox Accessibility Extension, Fangs, and Color Contrast Analyzer. The URLs for the web sites where you can install these extensions are listed on the screen. You may want to pause the movie at this time to write them down. The Web Developer extension can be downloaded from chrispederick.com/work/web-developer.

Customizing Firefox for accessibility testing

>> Now that we've downloaded Firefox there are a number of extensions that you can add to it for testing the accessibility of your web sites. The four extensions that we are going to add are named Web Developer, Firefox Accessibility Extension, Fangs, and Color Contrast Analyzer. The URLs for the web sites where you can install these extensions are listed on the screen. You may want to pause the movie at this time to write them down. The Web Developer extension can be downloaded from chrispederick.com/work/web-developer.

This extension adds a toolbar to Firefox with a number of tools that you can use for testing not only the accessibility of your web pages but other features as well. So download the extension, click on the Download for Firefox and Flock link. When you click on this link a yellow bar will appear at the top of your browser window that says Firefox prevented this site from asking you to install software on your computer. Click on the Edit Options button in this yellow bar. A dialogue box will come up listing the allowed sites that can install extensions to Firefox.

The address of this web site will be listed and there is a button that says Allow. Click this button to add this web site to your list of allowed sites. The web site now shows up in the list of sites. So we can click the close button at the bottom of the dialogue box window. Now that we're able to install extensions from this site we can once again click on the link that says Download for Firefox/Flock. This time a dialogue box comes up saying "Software Installation" with the name of the extension.

Click on the Install Now button. Firefox will download the extension and tell you that you need to restart to complete the installation. We have three more extensions that we're going to install before we restart, so close this box. Go to the next web site now, which is the web site for the Illinois Center for Information Technology Accessibility. The page that we're on is firefox.cita.uiuc.edu/index.php.

This is the page for the Firefox Accessibility Extension that this organization offers. This extension was designed for people with disabilities but is also useful for web developers. It shares a lot of features with the other web developer extension that we just downloaded, but has some other accessibility features that we'll show. To install this extension go to the orange box on the right side of the page, and click on the link that says Install from extension web site. This will take you further down the page, and there's a link that says select the Mozilla Firefox Extension 1.0 installation link.

Click on this link. Once again, a yellow bar will appear that prevents the download from this particular web site. Again, click on the Edit Options button. Click Allow, then Close. Then click on the Installation link again. Click on the Install Now button. And then close the add ons dialogue box once it has installed. Now let's go to the third web page. This is the web page for the Fangs extension.

The URL is www.standards-schmandards.com/projects/Fangs. This extension emulates the text that a screen reader would read, but instead of putting it in an easy to read text format. To install this extension click on the link that says to install Fangs click here on the left side of the page. Once again, in the yellow bar that appears at the top of Firefox click on the Edit Options button.

Click Allow, and then click Close. Then click on the Installation link again. Click on the Install Now button, and again close the Add-ons dialogue box once it has installed. Finally, let's go to the fourth web site. This is the page to download the Color Contrast Analyzer. The URL is juicystudio.com/article/color-contrast-analyzer-firefox/ extension.php.

You would need to scroll down the page a bit to get to the link to download it. Under the heading that says Contents click on the Firefox Extension link. Then click on the link that says Download the Color Contrast Analyzer. Follow the steps again to allow the site to install extensions. Click on Edit Options, then click on Allow, then Close. Then click on the Color Contrast Analyzer link again.

Click the Install Now button. And now that we have installed all four of these extensions we're ready to restart Firefox. So click the button in the Add-ons dialogue box that says Restart Firefox. It will warn you that you're about to close four tabs. Click Close Tabs. Now that these extensions have been installed you'll notice that there are two new toolbars at the top of the Firefox window. The first is the Web Developer toolbar. The next toolbar is the Web Accessibility toolbar.

In the next movie we'll use these tools on a web page to see how they can help evaluate its accessibility and show us what problems exist and how we might be able to fix them.

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This video is part of

Image for Web Accessibility Principles
Web Accessibility Principles

68 video lessons · 25807 viewers

Zoe Gillenwater
Author

 
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  1. 2m 0s
    1. Welcome
      1m 3s
    2. Using the exercise files
      57s
  2. 33m 15s
    1. What does accessibility mean?
      5m 51s
    2. How does accessibility help your users?
      3m 30s
    3. Experiencing a website via a screen reader
      5m 46s
    4. How does accessibility help you and your clients?
      3m 9s
    5. Overview of Section 508 standards
      5m 51s
    6. Overview of WCAG standards
      6m 4s
    7. Understanding consistency and semantic markup
      3m 4s
  3. 54m 31s
    1. Understanding screen readers and accessibility tools
      6m 12s
    2. Getting accessible browsers
      5m 41s
    3. Customizing Firefox for accessibility testing
      5m 53s
    4. Using custom accessibility toolbars
      5m 28s
    5. Using Fangs and the Color Contrast Analyzer
      5m 30s
    6. Accessibility tools to bookmark
      5m 53s
    7. Using automated accessibility checking tools
      4m 57s
    8. Setting up the JAWS screen reader on Windows
      6m 42s
    9. Using the VoiceOver screen reader on Mac OS X
      5m 52s
    10. Setting Dreamweaver accessibility preferences
      2m 23s
  4. 26m 12s
    1. Avoiding tables for layout
      3m 30s
    2. Using CSS for layout
      2m 40s
    3. Creating a fixed-width layout
      5m 51s
    4. Creating an elastic layout
      3m 51s
    5. Creating a liquid layout
      3m 4s
    6. Customizing a liquid layout
      7m 16s
  5. 1h 6m
    1. Specifying the language
      3m 43s
    2. Setting page titles
      2m 16s
    3. Setting headings and paragraphs
      9m 55s
    4. Styling headings
      9m 56s
    5. Hiding section headings from sighted users
      6m 41s
    6. Styling text for readability
      6m 41s
    7. Ensuring proper color contrast
      6m 36s
    8. Creating text emphasis
      4m 29s
    9. Indicating quotations
      4m 29s
    10. Creating basic lists
      4m 16s
    11. Styling lists
      7m 15s
  6. 1h 15m
    1. Using lists for navigation
      6m 45s
    2. Creating a horizontal navigation bar
      13m 25s
    3. Creating a vertical navigation bar
      11m 44s
    4. Adding skip navigation links
      12m 0s
    5. Hiding skip navigation links
      6m 17s
    6. Proper link text and title attributes
      6m 11s
    7. Opening new windows
      4m 28s
    8. Accessibility limitations of fly-out menus
      6m 30s
    9. Creating an accessible fly-out menu
      8m 38s
  7. 27m 55s
    1. Proper ALT text for navigation images
      4m 57s
    2. Proper ALT text for decorative images
      5m 19s
    3. Adding ALT text to an existing site
      6m 9s
    4. Adding ALT text to image maps
      5m 58s
    5. Describing complex graphics
      5m 32s
  8. 34m 1s
    1. Using tables for data
      3m 0s
    2. Creating header cells
      4m 5s
    3. Adding table captions and summaries
      9m 9s
    4. Styling tables
      5m 19s
    5. Applying header cells to complex tables
      6m 52s
    6. Adding id and headers attributes
      5m 36s
  9. 42m 7s
    1. Understanding form accessibility issues
      3m 7s
    2. Labeling form fields
      6m 9s
    3. Adding fieldsets and legends
      4m 42s
    4. Moving forms out of tables
      3m 44s
    5. Cleaning up a form's appearance
      4m 53s
    6. Aligning labels and fields using CSS
      9m 39s
    7. Indicating required fields
      6m 15s
    8. Dealing with CAPTCHA
      3m 38s
  10. 7m 29s
    1. The Text-Only technique
      3m 21s
    2. The Access Keys technique
      2m 35s
    3. The Tab Index technique
      1m 33s
  11. 18s
    1. Goodbye
      18s

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