Simplify the following text for a Grade 10 native English-speaking person.
Original: On March 10 , 2005 the Mozilla Foundation said , they will not develop the Mozilla Application suite which included the Netscape web browser , because Firefox and Thunderbird are more popular and because of that are important for them .
Simplified: On March 10 , 2005 , the Mozilla Foundation announced that it would not release any official versions of Mozilla Application Suite beyond 1.7 . x , since it had now focused on the standalone applications Firefox and Thunderbird .