Can firefox inspector change files on server? : i'm playing around with
firefox inspector and change some things
on a web page. 
Now the web hoster write me the webpage will be hacked.
I watch the page via www, dont have any passwords or so.
Is this coincidence or can a realy make changes on server
with the inspector?

The hoster write the affected file was a /cache_ac67f2ce3f.php
Thanks for your help