To install the Firefox plugin for Read&Write 11.5, please close Read&Write before following the steps below
1) From Firefox download the FirefoxHighlighter.xpi file
2) Save the file to your computer.
3) Go to the folder that you saved the file to, then click and drag the FirefoxHighlighter.xpi into the Firefox window.
4) Firefox will then prompt you to add the plugin, click Add.
5) Read&Write support for Firefox will then be added to Firefox.
6) Once the plugin has been installed successfully, close Firefox
7) Restart Firefox and launch Read&Write. Read&Write will now function with Firefox