[Trisquel-users] Re : Amazon force HMTL5 canvas accept Abrowser

[lcerf]

For all sites?  You may be interested in  
https://addons.mozilla.org/firefox/downloads/file/3046259/canvasblocker-0.5.11-an+fx.xpi  
(there exist other addons for the same purpose).

To manage the permissions of a given site, you can visit it and click on the  
icons at the left of the address bar.