Issue 5268 - Redirect firefox support link to forum thread

modules/web/templates/adblockplus.org.conf.erb

 # XSS and clickjacking prevention headers
 
 set $csp_frame "";
 if ($uri ~ ^/(:?\w\w(_\w\w)?/)?(?:index|firefox|chrome|opera|android|internet-explorer|safari|yandex-browser|maxthon)?$|^/blog/)
 {
   set $csp_frame "; frame-src www.youtube-nocookie.com;";
 }
 add_header Content-Security-Policy "default-src 'self'; img-src * data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' $csp_frame";
 add_header X-Frame-Options "sameorigin";
 
@@ skipping 118 matching lines @@
     rewrite ^ /forum/viewforum.php?f=18? redirect;
   }
   if ($arg_link = "edge_support")
   {
     rewrite ^ /forum/viewforum.php?f=27? redirect;
   }
   if ($arg_link = "knownIssuesChrome_filterstorage")
   {
     rewrite ^ /forum/viewtopic.php?t=23597? redirect;
   }
+  if ($arg_link = "firefox_support")
+  {
+    rewrite ^ /forum/viewforum.php?f=1? redirect;
+  }
   if ($arg_link = "adblock_browser_android_beta_community")
   {
     rewrite ^ https://plus.google.com/communities/104936844759781288661? redirect;
   }
   if ($arg_link ~ "^adblock_browser_promotion_\d$")
   {
     rewrite ^ https://adblockplus.org/adblock-browser redirect;
   }
   if ($arg_link = "adblock_browser_android_support")
   {
@@ skipping 198 matching lines @@
 location /403.html
 {
   try_files $uri @proxied;
 }
 location @proxied
 {
   proxy_pass https://server16.adblockplus.org;
   proxy_set_header Host adblockplus.org;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 }