If people can see your flight plan, they can avoid duplicating your work and can possibly help out or offer feedback. Bug Bugs and RFEs are composed of many fields. Some of them are described here. The mozilla application is composed of many different components such as the networking library, javascript, and the layout engine. Carefully read the component descriptions if you're unsure of which component to attribute your bug to.
Some components are very similar.
For example, problems with table layout should be assigned to HTML Tables, not to Layout. The component you choose determines which person Bugzilla assigns the bug to. The Status Whiteboard is used for writing short notes about the bug. This field is used to store various keywords . Write helpwanted in the Keywords field of one of your bugs or RFEs and others searching for things to do will find it.