Facebook Chat is cool, at least it allows you to send instant messages to online Facebook contacts. However I’m not really a fan of the chat bar being at the bottom of the page, what if I have left Facebook but still wants to remain chatting with my Facebook contacts? If you are using Firefox, you can place the Facebook Chat at the sidebar.
Step 1
Open Firefox and move to Bookmark Menu from top of the navigation bar. Click on Show All Bookmarks (CTRL+Shift+B)...
Step 2
Point to Organize Option and then click on New Bookmark...
Step 3
Fill the following details:

Step 4
Now Launch the Firefox sidebar, click Facebook Chat and start chatting with your Facebook contacts within Firefox.
Step 1
Open Firefox and move to Bookmark Menu from top of the navigation bar. Click on Show All Bookmarks (CTRL+Shift+B)...
Step 2
Point to Organize Option and then click on New Bookmark...
Step 3
Fill the following details:
- Name: Facebook Chat
- Location: http://www.facebook.com/presence/popout.php
- Check Load this bookmark in sidebar.

Step 4
Now Launch the Firefox sidebar, click Facebook Chat and start chatting with your Facebook contacts within Firefox.