Get Old Facebook Chat in Mozilla Firefox
First of all you need to install Grease Monkey addon in firefox in order to install the required script. To install grease monkey simple visit Grease Monkey Add-on and click on add to firefox.
After you click on add to firefox button you will get an popup for installing grease monkey. Click install and after installing grease monkey restart firefox.
Now after you have installed Grease Monkey Addon visit Facebook Chat Revision script Page and click install button present on the top right corner.
Now you will get a popup for installing the script, click install button and the script will be installed.
After installing the script just refresh the facebook page in order to see the changes. Now your old facebook chat with scroll bar will be back. If you are not getting the old facebook chat after following the above steps simply empty the cache and then refresh the page.
Get Old Facebook Chat in Google Chrome
If you are using google chrome then you can directly install the script. visit Facebook Chat Revision script Page and click install.
Then you will get a message in lower left corner of your browser asking you click continue.
After that you will get a popup to install the script, click install and script will be installed.
After installing the script just refresh the facebook page in order to see the changes. Now your old facebook chat with scroll bar will be back. If you are not getting the old facebook chat after following the above steps simply empty the cache and then refresh the page. For any problems or query feel free to drop a comment below.