If you mean Firefox, close Firefox by clicking the Firefox name on the top left of there screen and click Quit Firefox. Now open Finder or Applications and find the program Firefox. Left click it and drag it to the trash. Or right click and then click Send to trash.
To delete entries you've added to the Dictionary on your iMac, open the "Dictionary" app, then go to the "Edit" menu and select "Delete" or press the "Delete" key after selecting the entry you want to remove. If you’ve added custom words, you can also find them in the "User" dictionary section and delete them from there. Alternatively, you can reset the Dictionary by deleting the files in the "~/Library/Dictionaries" folder, but this will remove all custom entries.
Washington, DC to Fairfax, VA is 32 km
No, you can only get that discount on a new iMac not a refurbished iMac.
The original iMac was the G3 which came out in (1998). It was followed by the G4 (2002), then the G5 (2004), then the Intel iMac plastic version (2006). The 5th iMac was the aluminum iMac which came out in (August 2007), followed by the iMac Aluminum Unibody (2009). The newest iMac is simply called 2012 iMac and it came out on November 30, 2012.
There is no "iMac Air".
An iMac is a computer, but a computer is not necessarily an iMac, so they are not the same thing.
I do not have a 24" iMac. I have a 20" iMac. Apple no longer sells the 24" iMac. If you will click the Apple logo on the top left of your screen and then click About This Mac then More Info you can find the answer.
The iMac
The original iMac was created in 1998.
No
The iMac was invented and went on sale in 1998. The iMac as it looks today was introduced in 2006.
The original iMac G3 was introduced in 1998. The iMac G5 which placed all the components behind the screen came out in 2004.