1. Open your profile folder, for details of how to find it see https://support.mozilla.com/kb/Profiles
2. Close Firefox
3. Inside the profile folder is there a folder called chrome - if there is open it, if not create a folder called chrome
4. Inside the chrome folder, if there is a file called userChrome.css edit it using a text editor, or create a new file and name is userChrome.css
5. Add the following code to userChrome.css (you will need to scroll to see the full code)

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#statusbar-display:not([label^="Looking"]):not([label^="Connecting"]):not([label^="Connected"]):not([label^="Transferring"]):not([label^="Waiting"]):not([label^="Read"]) 
{opacity: 0 !important; }

Wow, thank you! I'll give this a try.

The above posted code will still show the message that appear while the page is loading.
If you never want to see that pop-up then you can use this code:

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

#statusbar-display {display: none !important;}

• http://kb.mozillazine.org/Editing_configuration
• ChromEdit Plus: http://webdesigns.ms11.net/chromeditp.html

There is an addon that solves this problem. It restores the "original" status bar like on 3.6 and the pop-up is GONE!!

Go to get addons, in the searchbox type without quotes "status-4-evar".

Windows Vista /7 ...User...... Pale Moon is Firefox 8/9.. (Windows)...!!

Pale Moon project: “Custom-built and optimized Firefox browsers for Windows Operating Systems.”

What is Pale Moon? It’s an open source project that takes the Firefox web browser code and recompiled it to run faster in Windows. Pale Moon, built and compiled specifically for Windows operation system..

All of your old add-ons should continue to work.

“You’ll just get around the web a little faster”..!!

... Corel ..

Thank you for this user script.. "It was the perfect solution for me"

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

1. statusbar-display {display: none !important;}

______________________________________

Eazzzy Peaszzyy…With this add-on..!!

Stylish 1.2.4

Highlight script..and .. Right clic >>Copy … “Script”

A; Add-on Manger (Window)… + open Add-on Manager [Window] ..>>>.. /Left of window..scroll down.. + click User Styles… + User Styles Window…>>.. (Top /Left) clic… Write New Style {Button}…

B: User Styles (Window) 1st… Manually Type a “Name” Title:…User preference .. for your script ..>>> 2nd.. Place mouse in large bottom portion of window and right click ..>>paste…. 3rd.. Hit Save (Button)…..

Tada..Done….!!!

The annoying status bar "Pop-Up"...is gone…!!!

Every thing else remains the same...