Did you check the Canvas setting in "Tools -> Page Info -> Permissions" ?

Try the Firefox version from the official Mozilla server if you currently use a version from the repositories of your Linux distribution.

• https://www.mozilla.org/en-US/firefox/all/

Thanks for try to help to solve this issue.

I try to disable canvas fingerprint.It works only disable the cookies but i dont want to disable cookies just canvas fingerprint.

I got my firefox with the latest Ubuntu.

I couldnt find Tools-->Setting-->Permission can you make me more clear please thanks

https://wiki.mozilla.org/Fingerprinting https://wiki.mozilla.org/Security/Fingerprinting

Can always plug sites into this for a look, (respected company) , https://www.grc.com/fingerprints.htm

Can also try one of these : https://addons.mozilla.org/en-US/firefox/search/?platform=windows&q=fingerprinting