Problem Description

• Issue: URLs are not being blocked as expected.
• Expected behavior: When a URL matches one in the blacklist, it should be blocked dynamically.

Current implementation

• I’m using chrome.webRequest.onBeforeRequest to intercept requests.
• I fetch the blacklist using fetchBlackList() which retrieves URLs correctly.
• I compare the request URL with entries in the blacklist and attempt to block using chrome.declarativeNetRequest.updateDynamicRules.

Observations

• I’ve verified that fetchBlackList() returns the expected URLs.
• The comparison logic in isBlocked seems correct based on console logs.
• However, URLs continue to load despite being in the blacklist.

What I’ve tried:

Implemented fetchBlackList():

Successfully retrieved the blacklist of URLs from my API using fetchBlackList(). Confirmed that the URLs returned are correct and match those in the database.

Comparison logic (isBlocked):

Implemented a comparison logic to check if the current request URL matches any URL in the fetched blacklist. Used RegExp to ensure accurate matching of domain and path.

Dynamic rule addition (chrome.declarativeNetRequest.updateDynamicRules):

Attempted to add dynamic rules to block URLs that match entries in the blacklist. Generated unique rule IDs and set up blocking actions accordingly.

Debugging with console logs:

Used extensive logging (console.log) throughout the code to trace the flow of data and confirm that URLs are being evaluated correctly in the onBeforeRequest listener.

Expected outcome:

When a user tries to access a URL that is listed in the fetched blacklist, the Chrome extension should dynamically block that request before it’s sent, using chrome.declarativeNetRequest.updateDynamicRules.