I need a "zoom tool" for the entire screen because I want to control a bar with the mouse (time bar, like youtube) from an web-based audio player. The problem is that this player is too small and when I try to zoom-in (with Ctrl+Mouse Wheel), all characters, pictures are zoomed in, but not the Audio Player (it keeps its size).
Any suggestions? Thank you in advance. I have Ubuntu 14.04 with a Nvidia and I use the audio player normally within Firefox.