hi gege07,
the voir function also adds to the downloads, because i think that ideally the voir function can become an alternative to downloading for most people without needing to clutter up their computer with downloaded scores, it is in this spirit that voir also adds to the download counter,
you should also know that the download counter is only for information and has no direct consequences.
except in the near future to see the most popular scores :)
For the left and right keys, several people made me the remark, it is the editor used which prevents that I will investigate that of my return on Internet...
Concerning the bug of visualization, a plugin in the browser must be installed in order to visualize the pdf. Unfortunately this is not my responsibility and there is nothing I can do. A browser can't read pdfs...
But all browsers have plugins that allow it, if you use firefox I invite you to do a simple search on google 'plugin visualize pdf' which should allow you to install a plugin to solve the problem.
Thank you.