Text: level 3 will be implemented in firefox for windows first, and later on in firefox for osx and linux.

Correct capitalization: Level 3 will be implemented in Firefox for Windows first, and later on in Firefox for OSX and Linux.

Text: it is a game developed in studies of freshplanet, this company realized the great potential of music in a game. it is therefore, they decide to launch mobile songpop, a very lucrative game in the world of applications.

Correct capitalization: It is a game developed in studies of FreshPlanet, this company realized the great potential of music in a game. It is therefore, they decide to launch mobile SongPop, a very lucrative game in the world of applications.

Text: after returning to poland he gave these manuscripts to his parents for safe keeping.

Correct capitalization: After returning to Poland he gave these manuscripts to his parents for safe keeping.

Text: this allows the intelligence of windows to decide the correct software application to open your hme file.

Correct capitalization:
This allows the intelligence of Windows to decide the correct software application to open your HME file.