Added filters for Facebook and Reddit

facebook.txt

@@ -0,0 +1,20 @@
+! Block Facebook pages by default
+||facebook.com^$document
+
+! Hide the content of Facebook's homepage in case the user proceeds anyways.
+facebook.com###facebook
+facebook.com##div[role="main"]
+facebook.com##div[role="navigation"]
+facebook.com##div[role="complementary"]
+
+! Allow Facebook Marketplace
+@@||facebook.com/marketplace/$document
+
+! Unhide main content on Marketplace
+facebook.com/marketplace#@##facebook
+facebook.com/marketplace#@#div[role="main"]
+facebook.com/marketplace#@#div[role="navigation"]
+facebook.com/marketplace#@#div[role="complementary"]
+
+! Hide the banner at the top of the page to prevent SPA-style navigation back to the homepage
+facebook.com##div[role="banner"]

reddit.txt

@@ -0,0 +1,14 @@
+! Block all Reddit pages by default
+||reddit.com^$document
+
+! In case the user chooses "Proceed", blank out all articles (feed posts) on the Reddit homepage.
+reddit.com##article
+
+! Hide the sidebar, except for in subreddit homepages so you can read the descriptions and rules.
+reddit.com##:not(:has(shreddit-subreddit-header))#right-sidebar-container
+
+! Allow individual post pages (which always contain r/*/comments/)
+@@||reddit.com/r/*/comments/$document
+
+! Hide <nav> elements to prevent SPA-style loading of feeds.
+www.reddit.com##nav