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Reviews for CanvasBlocker

CanvasBlocker by kkapsner

4.5 Stars out of 5
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Review by Firefox user 12806971
by Firefox user 12806971, 8 years ago
New features are somewhat confusing for usual users like me. Should I enable transparency blocking?! ot it doesn't matter much?!
Also when updated some options are missing like the "Ignore the most frequent colors".
Also why not to set Random Number to Persistent by default, it will be changed on every browser startup, right?!

Developer response

posted 8 years ago
The former versions faked the transparency always. But since this channel is treated differently by the browsers I think it is saver to not fake it. It does not affect the security.

Regarding the missing options: only these options are displayed that are useful with the other selected options. The mentioned "ignore the most frequent colors" is only displayed in expert mode and when faking the read API.

For the default random number generator I ask you to open an issue at github. This has to be discussed in more depth. I myself are not sure what the default should be.
461 reviews
  • by Edgar Almeida, 3 days ago
    Seems to work, if you test it at browserleaks(dot)com / canvas with the plugin on, keeps giving new signatures at each refresh, if you turn the plugin off, the signature will remain the same
  • by 魔王, 7 days ago
  • by Kal, 8 days ago
    Doesn't seem to work. Visited the EFF page (coveryourtracks.eff.org) to check fingerprinting and no luck.
  • by Zertrax, 13 days ago
    Works very well. If you want to test this addon whether it works or not, just visit the page which is mentioned in the description. (for example: browserleaks website)

    It's just a shame that I only recently discovered canvas fingerprinting, even though it's been around for so long. Keep your privacy up folks.
  • by BRUHCORE, 21 days ago
    memory leak on YouTube
  • by 0x_numerolog, a month ago
    Хорошее расширение
  • by whatever, a month ago
  • by VOIIIXI, a month ago
  • by CHANO, 2 months ago
    I became suspicious when there is no tally count, so I went to coveryourtracks.eff. ran the fingerprinting scan and found the app was doing absolutely nothing at all but sitting in my browser collecting info.I will be removing it.And running a system malware scan.
  • by Firefox user 19145735, 2 months ago
  • by Firefox user 19141042, 2 months ago
  • by NameOfDisplay, 2 months ago
    I like the concept of the addon but this is basically useless until the developer explains literally anywhere how to add sites to the whitelist and the settings page doesn't absolutely suck.

    Only really useful if you are the developer and understand all of the obtuse menu options.
  • by Mikaela, 3 months ago
  • by BrunoFontes.Net, 3 months ago
  • by Firefox user 19062474, 3 months ago
    No instructions on how to use it. Not intuitive to use. I have not a clue if it is doing anything because of this. I will leave it on incase it is working. It would be better as an app to work all the time my device is on rather than just inside my browser.
  • by thevoid, 3 months ago
  • by Сырное, 3 months ago
  • by Firefox user 12814982, 3 months ago
    An sich ein wirklich klasse AddOn, was Webseiten definitiv zu schaffen macht.
    Leider bremmst es den Browser je nach Seite extrem aus.
    Gerade Karten-Webseiten wie z.B. Google Maps sind teilweise unbenutzbar, wenn der CanvasBlocker zuschlägt.

    Der Blocker von Firefox selbst, ist hier etwas harmloser, dafür aber auch von der Block-Qualität schlechter.
  • by Rinshun, 4 months ago
  • by Firefox user 18642424, 4 months ago
  • by Firefox user 14186837, 4 months ago
    Made my rating on EFF's CoverYourTrack tool worse!
  • by Sonya, 4 months ago
  • by Firefox user 17288647, 4 months ago
    This is a game changer. This security add-on compliments your VPN and enhances the security of your web surfing experience. You should include this as one part of your layered strategy security plan.
  • by josh L., 4 months ago
  • by t3 ur u4 to c3, 4 months ago
    its good but it would be great if right-clicking on the extension also had an option to temporarily disable it for testing purposes