So....
Below are the short cut keys i normally use. hehehe
1. Keyboard only shortcuts.
Control + tab = Switch tabs or move from one browser tab to the next.(applicable to MSN messenger tabs as well)
Control + shift + tab = Switch tabs backwards.
Control +R/F5 = Refresh or reload page.
Control + F5 = Refresh (override cache).
Control + D = Add to bookmark
Control + W = Closes active tab(applicable to normal windows folder)
2. Keyboard plus mouse shortcuts.
Control + left click = Open in background tab
Control + shift + left click = Open in foreground tab.
Shift + left click = Open in new window.
Middle click (press mouse wheel once) = Hit tab anywhere to close it.
I found the shortcuts above from some sources and it appears that there're more shortcuts there. Please click into the links if you want to know more shortcuts.
I know that some of you might have posted this or you might know about these shortcuts already, anyhow, i posted this for my own reference as well.
cheers =)
Sources links :
Firefox-keyboard-and-mouse-shortcuts-useful-for-entrecarders
Firefox Cheatsheet
hack-attack-mouseless-firefox