I have a list in a different comment, I think YouTube was on there so that I could enable the old format which I think works better with Magic Actions for YouTube (player sizes), also had to temp disable uBO to get the old format. I’m guessing that right now, in Firefox and Nightly, I have more sites whitelisted than are being actively blocked with bogus canvas image data. I have almost always used Pale Moon (no webextensions) when ordering anything online because that’s where most of my passwords are but then I also tried ordering that same pizza in FF v56 with the webext enabled and it worked fine. One saving grace is that you have to choose “Don’t Allow” on each specific website but still, if you don’t notice broken functionality until a later visit will the user remember that permission being set? Or what happens when a website is optimized, redesigned or whatever in the future?Ī few days ago I tried ordering a pizza online using Nightly and it would not work because Canvas Defender was enabled, there was no popup warning about possible fingerprinting. I’m just wondering if this new feature could cause similar problems on other websites in the future.Īt this point, I still have the add-on set to disabled, for just wondering if this new feature could cause similar problems on other websites in the future.” I then went back to the commercial site – went back to the bill-pay area- and everything was back to normal and it went through without a hitch. – but nothing worked.įinally, I remembered the recently-installed “Canvas Defender” add-on and disabled it in the the FF add-on menu. I wasted time on the phone with customer service – getting the normal CSR script about cleaning my cache, etc. However, when I tried to select certain options during the normal bill-pay process, my selections were not being seen and I kept getting kicked back to the “Please make a selection” menu over and over again. I liked the way it provided warnings about fingerprinting on certain websites I visit regularly.Ī few days after installing the add-on, I went to online to a commercial website to pay one of my regular monthly bills, and everything seemed fine – no warnings about canvas fingerprinting. Ī few weeks ago I installed an add-on called “Canvas Defender” to Firefox.API differences or about:config edits? Who knows.ĭ, One weird thing is using Canvas Defender in Chromium browsers I only had to whitelist 3 websites instead of the 8 that I had to whitelist in FF. Anyway, it seems like more than half of the websites that I saw a warning on had to be whitelisted because some type of functionality was broken on the site. ‘Blocking’ the data does break more websites, which I was able to see when I used a command line switch (–disable-reading-from-canvas) in Chrome. Canvas Defender doesn’t block the canvas image data it uses a random canvas noise hash instead. I’ve been using Canvas Defender for a few months now and it has a popup warning about possible fingerprinting on maybe 12 websites out of many dozens that I regularly visit, on most websites I don’t see a warning. Just saying, I haven’t completely made up my mind. In version 57 resource URI leaks were taken care of and now with Mozilla continuing the work on reducing fingerprinting it’s kind of getting to be a big deal in my opinion, the privacy improvements.Īctually, I’m not 100% convinced, based on the websites that I visit, that canvas image data is worth ‘me’ being concerned about. Glad to see that they are making some progress on canvas fingerprinting. I’m not seeing the new prompt in Nightly yet, maybe when I get the next update.