Browsing Brazilian Portuguese translation

ACCOMPLISHMENT: Signed the Canonical Contributors Agreement ('summary' field)
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ORIGINAL TRANSLATION:
For certain free software projects managed by Canonical, Canonical asks contributors to send contributor licence agreement form. This agreement establishes a relationship between Canonical and the contributor, gives details on what it means when the contributor grants permission for their work to be included in a project, and enables Canonical to be better stewards of these projects.
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----- TRANSLATION INSTRUCTIONS -----
Introduce the accomplishment, explain what the different concepts are that are involved, and provide guidance on how to accomplish it.
NOTE: Break this into paragraphs by putting each paragraph on a new line.
FORMATTING ALLOWED: <i> <strong> <tt>