File > Install Extension... and paste https://github.com/albertxing/brackets-tabs. Refresh Brackets (F5).
Download the ZIP. Extract into extensions folder. Refresh Brackets.
Show/hide sidebar View > Show/Hide Sidebar (Ctrl-Shift-H) toggles sidebar & tabs.
Switch tabs by clicking.
Reorder by dragging.
Feel free to submit a pull request if you find any bugs (to see a list of active issues, visit the Issues section). Please make sure all commits are properly documented.
Active development by the author of this extension has ceased. He is busy with college and other projects. However, if this project is important to you, don't hesitate to submit pull requests (see Contributing above). If you are an active contributor, I will consider adding you as a committer to this repository.