Can I bundle the Bamboo log CSS in a browser extension?

[Samuel Dion-Girardeau]

I'm a maintainer of a small open source project named Bamboo Log Enhancer.

The purpose of the extension is to add color to your Atlassian Bamboo log files when you view them in raw text, in order to distinguish "build", "command", "error", and "simple" output.

This browser extension is distributed in the Chrome Web Store () and as a Firefox add-on, and has ~100-200 users.

I recently got a pull request from one user, who wished to improve on the log formatting: https://github.com/samueldg/bamboo-log-enhancer/pull/10/files

This contributor included a CSS file taken from their Bamboo instance, and I wasn't sure it was legitimate to redistribute this CSS file as part of the extension (see the comment I made on this pull request).

I'm reaching out to know if:

1) I'm allowed to redistribute the CSS file in my extension, and if so what kind of licensing information I need to include.
2) If not, is there a hosted version I could point to from the extension, such that I wouldn't need to include any proprietary CSS in my extension bundle.

Thanks in advance for your help!