From 1d1080af7d347df4afe7c4cb7090eeac93a89003 Mon Sep 17 00:00:00 2001
From: MishraSanskriti <sanskritimishra15@gmail.com>
Date: Wed, 9 Apr 2025 19:14:43 +0530
Subject: [PATCH] Added block/unblock functionality in Firefox

---
 websiteblocker.py | 52 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 49 insertions(+), 3 deletions(-)

diff --git a/websiteblocker.py b/websiteblocker.py
index 95a7a45..28819ee 100644
--- a/websiteblocker.py
+++ b/websiteblocker.py
@@ -1,6 +1,8 @@
 import time
 import sys
 import platform
+import os
+import psutil
 
 #function to fetch the URLs that have been saved in urllist.txt for blocking
 def fetchurls():
@@ -9,7 +11,7 @@ def fetchurls():
 		urllist = [line.rstrip() for line in file]
 	return urllist
 
-#fetching the URLs, defining the redirection to localhost 127.0.0.1
+# Fetch URLs from the file
 sites_to_be_blocked = fetchurls()
 redirect = "127.0.0.1"
 
@@ -17,13 +19,53 @@ def fetchurls():
 #Currently working for Microsoft Windows, Linux Distributions and MacOS
 if platform.system() == 'Windows':
     host_file = r"C:\Windows\System32\drivers\etc\hosts"
+    firefox_profile = os.path.expanduser("~\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles\\")
 elif platform.system() == "Linux" or platform.system() == "darwin":
     host_file = "/etc/hosts"
+    firefox_profile = os.path.expanduser("~/.mozilla/firefox/")
 else:
     print("Expected your OS to be Windows, Linux or MacOS but found something else, hence quitting...")
     sys.exit(1)
 
-#function that will block or remove blocking based on user request
+# Function to disable DNS over HTTPS (DoH) in Firefox
+def disable_firefox_doh():
+    global firefox_profile
+    if not os.path.exists(firefox_profile):
+        print("Firefox profile directory not found.")
+        return
+
+    # Locate the correct Firefox profile folder
+    for folder in os.listdir(firefox_profile):
+        prefs_file = os.path.join(firefox_profile, folder, "prefs.js")
+        if os.path.exists(prefs_file):
+            try:
+                with open(prefs_file, "r+") as file:
+                    lines = file.readlines()
+                    file.seek(0)
+                    for line in lines:
+                        # Remove existing DoH settings
+                        if "network.trr.mode" not in line:
+                            file.write(line)
+                    # Append the new setting to force system DNS resolution
+                    file.write('user_pref("network.trr.mode", 5);\n')
+                    file.truncate()
+                print("DNS over HTTPS (DoH) disabled in Firefox.")
+            except Exception as e:
+                print(f"Error modifying Firefox prefs.js: {e}")
+            return
+			
+
+# Function to clear Firefox's DNS cache by restarting it
+def restart_firefox():
+    for proc in psutil.process_iter(['pid', 'name']):
+        if "firefox" in proc.info['name'].lower():
+            print("Restarting Firefox...")
+            proc.terminate()
+            time.sleep(2)  # Give Firefox time to close
+            os.system("firefox &")  # Restart Firefox
+            return
+
+# Function to block sites by modifying the hosts file
 def block(answer):
 	while True:
 		with open(host_file, 'r+') as hostentry:
@@ -51,6 +93,7 @@ def block(answer):
 			else:
 				continue
 
+
 if __name__ == '__main__':
     answer = input("Do you want to enable content filtering(you need to focus)?[Y/y or N/n]")
 
@@ -59,4 +102,7 @@ def block(answer):
         print("Great\nFetching the blocked URLs from your Database(urllist.txt).")
         time.sleep(1)
         print("\nDefault blocking has been enabled as per request.")
-        block(answer)
+		# Disable Firefox DoH & restart Firefox
+        disable_firefox_doh()
+        restart_firefox()
+        block(answer)
\ No newline at end of file