Re: Laptop brightness
Try going to Power Options, if using Windows Vista or 7 type it in the search bar on the Windows Start Menu and see what settings you have in there.
To remove that ad press Ctrl + Shift + Esc to bring up task manager and look for the process in there then click on it and press End Process. The process should read Mozilla Firefox under the task name, you may have multiple instances of it, but just end all of them and re-open your web browser.
Education: B.Sc IT
Certifications: CCNA:S, CCNA:R&S, CCENT, Linux+, LPIC-1, CLA, A+, Net+, Sec+, Project+, CIW:WF, CIW:WDS, CIW:JS, CIW:v5DBS