Place Facebook Chat on Firefox Sidebar:

Open Mozilla Firefox browser and press Alt key.

Select bookmarks and select "show all bookmarks"

A box will open from that select unsorted bookmarks > organise >  new bookmark.

Again a box will open in that type "facebookchat" in first boxand type "  http://www.facebook.com/presence/popout.php " in second box .

Click on load this bookmark >add.

Now again press alt key > view > side bar > bookmarks>.

Then select facebook chat from the bookmarks in slide bar.

You are done.Now you will be able to see chat bar on the left side of your Mozilla Firefox Browse