We all know how annoying it is to register at a forum just to view the contents in it.
You can look at the contents in forums if you act as a Google bot.
This can be easily achieved.
Firstly install this to your firefox.
https://addons.mozilla.org/en-US/firefox/addon/59
Restart firefox.
Then go to tools Default User Agent->User Agent Switcher->Options->New
Add this to Description:
crawl-66-249-66-1.googlebot.com
Then this to User Agent:
Googlebot/2.1 (+
http://www.googlebot.com/bot.html)
Remove the rest of the field to blank,then press ok,
Go to tools again and select crawl-66-249-66-1.googlebot.com
Now if you go to a forum that you are not registered at you should be google bot.
You need not register to view the forum now.