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# Open a shell and change the working directory to the application's installation directory by using the cd command. '''Important:''' running the update from within another directory will fail to update the existing installation properly with Firefox 3.6.x and below, SeaMonkey 2.0.x and below, and Thunderbird 3.1.x and below.
# It is recommended that all instances of the application that are running on the system including those being used by other users are closed before going any further. '''Important:''' though this should never cause the update to fail there might be cases where it will and it can definitely break a running instance of the application.
# For Firefox 40.x and above and above run the following from the command prompt after adding the path to the existing installation directory to the '''LD_LIBRARY_PATH''' environment variable. The additional <code><path to installation directory></code> is used by applications for update staging and when manually applying a mar the value for this command line parameter must be the path to the installation directory.<br><pre style="white-space: pre-wrap;
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