How to Disable Facebook Sidebar-Chat ?
If you are a Mozilla Firefox or Google Chrome user, this tutorial should work perfectly fine for you. If you are a Firefox user, you will need to install Greasemonkey extension for scripts to be working on your browser. You can find the Greasemonkey extension here. Chrome users do not need to install any extension or add-on on their browsers since Google Chrome supports Greasemonkey scripts directly.
[Download Userscript]
#After you have successfully installed the Greasemonkey extension on Mozilla Firefox, you need to download a user-script -’Facebook Sidebar Chat Revision‘. on your browser and install it using Greasemonkey. Chrome users can install the user-script directly. Download link for both browsers below.
#Once you install it on your favorite browser, you can now navigate to Facebook to check your old chat. You should find your old Facebook chat interface back.