There was a spell-checking addon for Coranto, but the file is no longer available from the author. What is suggested here will provide spell-checking capability whenever you are entering text into a text box on an html form.
GNU Aspell provides spell-checking capabilities for both of these browsers.
For Firefox you need to install the Firefox Aspell extension.
Opera will recognize Aspell once it is installed on your system. So if you use both Firefox and Opera, once you follow the steps to install Aspell for Firefox Opera will use Aspell the next time it is started. See this Opera tutorial for more information about using Aspell with Opera.
If you use Internet Explorer you can install ieSpell. From the ieSpell homepage:
The advantages to using a client side spell-checker:
- The same spell-check interface is displayed to the user whenever text is entered regardless of the web application being used
- Faster operation
- Lessens server load
- Allows the user to customize dictionaries
- Custom dictionaries are available across different web applications
- Ability to spell-check all text fields on a page