Request RegEx Filter - Filter HTTP Requests
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To configure this Add-on, Open the Add-ons/Extensions page of your browser or type "about:addons" in the address bar in Firefox.
Click on "Options" for the Request RegEx Filter add-on.
Then you can add or remove from the list of Regular Expressions that will denylist the http request.
For more details on how to write a regular expression, here are some resources:
For Example: Add the following regular expression to the denylist- http(s)?:\/\/ads[.]
This regex is purely for demonstration purposes. The above Regular Expression has the limitation that any website starting with "ads." would be blocked. So if you legitimately want to be visiting a site with a domain name prefixed with "ads." you would avoid using this regex.
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Add-on safety
Risk impact
Request RegEx Filter requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Request RegEx Filter is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.