Firefox extention FoxReplace 0.9.0 lets you replace text in web pages, you can define a substitution list and apply it automatically or at your own discretion or make individual substitutions.
You can replace text fragments (strings) in a page by other text fragments.
It adds an intuitive menu item to the Edit.
The system is based on substitutions, where each substitution has an input text which has to be replaced (the “Replace” field) and an output text by which the first has to be replaced (the “With” field). When a substitution is applied it’s over the whole content of a page (you can’t do partial substitutions at the moment). Substitutions can be case-sensitive or insensitive. The use of regular expressions is also supported.
You can do individual substitutions or define a list of substitutions to apply all at once. You can define substitution lists that apply only to pages that match an URL. You also have the option to apply the substitution list automatically whenever a page is loaded.
To Download and read more in detail about this extension, please visit the link below: