may I suggest the browser preview to be shown in a split view, side by side with the source page.
It is not really helpful to have it in the left sidebar or even in the bottom region. Yes, I know, I can open a separate window, but this hides behind the editor as soon as I edit something in the source file.
Thanks for your attention
UH
One of the things that Front-End designers will sometimes face is LESS -> CSS compiling and I found this page most usefull for me and works great on Geany and Fedora Linux for automatically compiling when saving LESS file.
I use the Ian Marcinkowski modified script as that handles also editing LESS import files at the same time. Geany Terminal is very usefull for this. Maybe this (or something better) could be added to Geany for front-end developer guide?