Service '/usr/bin/firefox' is malformatted
 

When someone send me a link on viber and click on it , pops up that dialog
"Service '/usr/bin/firefox' is malformatted"
How can fix this ?
I use slackware 14

Hmmm... you don't give ANY useful info...

But from the message I would guess that it is a SCAM intended to get you to "fix" firefox by downloading malware from the site. I would "fix" it by aviding clicking on that link!

If this is not correct you will need to supply far more information about distro, software versions, exact messages displayed, etc...

Distro is Slackware 14.1 x64. Yesterday uninstalled the old firefox 24 with pkgtool ans installed with slackpkg ver 34. So if someone sends me a link through viber a link , for example http://yahoo.com and i click on it pop up that message and firefox dont start.

Ah! I did not know what "viber" was, took that to be a website.

It sounds like a viber configuration problem. Perhaps installing the new firefox broke a path that viber was using to find firefox.

I would suggest that you look in the viber configs or settings or whatever it calls it, and set whatever option specifies the browser or http protocol application handler.

I know nothing about viber so beyond the above, I must defer to someone else.