You must have faced this annoying issue especially on forums where they tell you to complete a survey before you can view their content. Many times I have faced that the surveys don’t work in my country and hence I am unable to access the forum.
Adblock Plus extension has become one of the most popular firefox addons installed. Now whenever you surf around the web, the things which you mostly see are advertisements. Adblock Plus automatically removes pestering ads once you assign which ads to block. Simply click "Open Blockable Items" and remove ads from any advertiser forever. Watch a quick overview at youtube.
Note : I sometimes view the Page Source (Ctrl+U) and find the necessary content therein.
Hope this will help you…
Also See : View Forum Post Content without Registering