diff --git a/docs/_static/instaloader.css b/docs/_static/instaloader.css
index f8f96b7..4c92ea1 100644
--- a/docs/_static/instaloader.css
+++ b/docs/_static/instaloader.css
@@ -17,15 +17,16 @@ code {
   .highlight pre {
     padding: 0.7em;
     color: #fff; }
-  .highlight .c1 {
+  .highlight .c1, .highlight .k, .highlight .kn, .highlight .ow {
     color: #008d06; }
-  .highlight .k, .highlight .kn, .highlight .ow {
-    color: #f48400;
-    font-weight: bold; }
-  .highlight .nb {
+  .highlight .nb, .highlight .ne, .highlight .nf, .highlight .vm {
     color: #f48400; }
-  .highlight .s1, .highlight .s2, .highlight .mi {
+  .highlight .s1, .highlight .s2, .highlight .sa, .highlight .se, .highlight .si, .highlight .mi {
     color: #ff7efd; }
+  .highlight .c1, .highlight .nf, .highlight .sa, .highlight .se, .highlight .si {
+    font-style: italic; }
+  .highlight .k, .highlight .kn, .highlight .ow {
+    font-weight: bold; }
 
 .doc-content {
   padding-top: 0.5em;
diff --git a/docs/_static/instaloader.scss b/docs/_static/instaloader.scss
index 70935e7..4680585 100644
--- a/docs/_static/instaloader.scss
+++ b/docs/_static/instaloader.scss
@@ -36,22 +36,25 @@ code {
     color: #fff;
   }
 
-  .c1 {
+  .c1, .k, .kn, .ow {
     color: $color_instaloader_main
   }
 
-  .k, .kn, .ow {
-    color: $color_instaloader_accent;
-    font-weight: bold
-  }
-
-  .nb {
+  .nb, .ne, .nf, .vm {
     color: $color_instaloader_accent
   }
 
-  .s1, .s2, .mi {
+  .s1, .s2, .sa, .se, .si, .mi {
     color: $color_instaloader_hyper
   }
+
+  .c1, .nf, .sa, .se, .si {
+    font-style: italic;
+  }
+
+  .k, .kn, .ow {
+    font-weight: bold
+  }
 }
 
 .doc-content {
diff --git a/docs/codesnippets/615_import_firefox_session.py b/docs/codesnippets/615_import_firefox_session.py
index 84630bc..dd98f7f 100644
--- a/docs/codesnippets/615_import_firefox_session.py
+++ b/docs/codesnippets/615_import_firefox_session.py
@@ -10,7 +10,7 @@ except ModuleNotFoundError:
     raise SystemExit("Instaloader not found.\n  pip install [--user] instaloader")
 
 
-def get_cookiefile() -> str:
+def get_cookiefile():
     default_cookiefile = {
         "Windows": "~/AppData/Roaming/Mozilla/Firefox/Profiles/*/cookies.sqlite",
         "Darwin": "~/Library/Application Support/Firefox/Profiles/*.default/cookies.sqlite",
@@ -22,7 +22,7 @@ def get_cookiefile() -> str:
 
 
 def import_session(cookiefile, sessionfile):
-    print(f"Using cookies from {cookiefile}.")
+    print("Using cookies from {}.".format(cookiefile))
     conn = connect(cookiefile)
     try:
         cookie_data = conn.execute(
@@ -37,7 +37,7 @@ def import_session(cookiefile, sessionfile):
     username = instaloader.test_login()
     if not username:
         raise SystemExit("Not logged in. Are you logged in successfully in Firefox?")
-    print(f"Imported session cookie for {username}.")
+    print("Imported session cookie for {}.".format(username))
     instaloader.context.username = username
     instaloader.save_session_to_file(sessionfile)
 
@@ -50,4 +50,4 @@ if __name__ == "__main__":
     try:
         import_session(args.cookiefile or get_cookiefile(), args.sessionfile)
     except (ConnectionException, OperationalError) as e:
-        raise SystemExit(f"Cookie import failed: {e}")
+        raise SystemExit("Cookie import failed: {}".format(e))