Absolute References. An absolute reference does not change when you move or copy a cell. We use the $ sign to make an absolute reference â to remember that, think of a dollar sign as an anchor. For example, enter the formula =$A$1 in any cell.bsolute References. An absolute reference does not change when you move or copy a cell. We use the $ sign to make an absolute reference â to remember that, think of a dollar sign as an anchor. For example, enter the formula =$A$1 in any cell.
Cross Platform Component Object Model (XPCOM) is a cross-platform component model from Mozilla. It is similar to Microsoft Component Object Model (COM) and Common Object Request Broker Architecture (CORBA).
In August 2015, Mozilla announced that the use of XPCOM for creating Firefox add-ons would be deprecated in the future in favour of WebExtensions. Pale Moon, a fork of Firefox, will continue to support XPCOM indefinitely. XPCOM is one of the main things making the Mozilla application environment an actual framework. It is a development environment that provides the following features for the cross-platform software developer: