It works for local PDF too. Noté 4 sur 5 étoiles
I entered the recommended site http://www.pdfescape.com and registered here (it isn't mandatory).
This site fully served me - I uploaded my pdf file and could edit it - to add the text, to erase the part of the text, to add circle etc.
I bookmarked this site and don't understand why I need this addon itself - the bookmark is fully enough.
I thank Red Software for a link to an excellent service