Then AdLock sends the modified response to the browser. Using the rule above, AdLock application processes the in the body of the response from, and by the regular expression “A”, replaces traced commercial content with the modifier “B”. After that, no advertising requests remain on the page, which prevents the broadcast of the advertising video. Using the rule with the $replace modifier applied to the request, a certain part of the page is replaced even before the browser had time to receive the HTTP response and draw the DOM tree. Advertisements on Twitch come embedded in the same stream with the video, which makes it impossible to block such a request with the basic filtering rules, as it would result in blocking of the whole video stream.įiltering rules with the $replace modifier, supported by the installable apps - AdLock Windows, Android, and Mac, fight this type of advertising perfectly fine, as they have the ability to modify the content at the network level. is an extremely popular video streaming platform with a broad audience. The only way to cut out the advertising part is to change it before being displayed to the user. The HTTP response can contain both useful and advertising content in the body. This limitation prevents the AdLock Chrome Extension from using some of the rules for modifying a web page before it reaches the browser. One of the most significant restrictions is the prohibition on modifying the body of HTTP responses (at the moment support for modifying is available only in Firefox and is already implemented in AdLock Firefox so you can try it out right now). At the same time, webRequest API is heavily restricted when working with filtering rules, which significantly limits the content filtering capabilities of browser extensions comparing to other AdLock products ( AdLock Windows, AdLock Android, and AdLock Mac). This API offers an opportunity to add a handler at different stages of an HTTP request to analyze, redirect, and block advertising and malicious requests. So, What’s the Conclusion? Into the MatterĪdLock Chrome extension uses the webRequest API to remove commercial content injected into the web page.

Adlock extension chrome