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Can't respond to dialog box before it disappears

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When signing in to some websites, I see a dialog box that flashes once and disappears before I can read it or respond to it. If I have cleared my browser and reset permissions, for example, it shows up when signing in to Amazon.com. This is a standard FF dialog, looks like the 'save/don't save' password permissions dialog, one side of the box is white, one side blue, but it appears and disappears in considerably less than a second, before I can read much less respond to it.

Once I did catch a box like this--maybe the computer was slowed with something else that day--which was about my giving permission to allow Amazon.com to use fingerprinting information from my browser.

My question: can I slow down such dialogs so that I can read them and actually decided whether to give permission or not?

When signing in to some websites, I see a dialog box that flashes once and disappears before I can read it or respond to it. If I have cleared my browser and reset permissions, for example, it shows up when signing in to Amazon.com. This is a standard FF dialog, looks like the 'save/don't save' password permissions dialog, one side of the box is white, one side blue, but it appears and disappears in considerably less than a second, before I can read much less respond to it. Once I did catch a box like this--maybe the computer was slowed with something else that day--which was about my giving permission to allow Amazon.com to use fingerprinting information from my browser. My question: can I slow down such dialogs so that I can read them and actually decided whether to give permission or not?
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  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Firefox/68.0

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cor-el
  • Top 10 Contributor
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17673 solutions 159870 answers

Do you see a Key icon at the left end of the location/address bar to indicate that Firefox may want to store the username and password for this website ?

If the doorhanger closes too quickly then you can click the Key icon to reopen the drop-down panel.

Do you see a Key icon at the left end of the location/address bar to indicate that Firefox may want to store the username and password for this website ? If the doorhanger closes too quickly then you can click the Key icon to reopen the drop-down panel.
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RobertJ
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108 solutions 1189 answers

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Hi Foxfree99, I think what you're seeing here is a permission to use HTML5 Canvas Image Data. Do you have resistFingerprinting set to true in about:config? I caught it using Print Screen. Once you give permission, this doorhanger displays quickly while it checks the permissions file. And, it appears to be set to Remember My Choice by default. I had to, very quickly, de-select the Remember box and select Don't Allow. Now, I see the Canvas Image Data icon on the address bar. If I find a way to slow it down, I'll let you know. Setting: privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False in about:config seems to help.

Hi Foxfree99, I think what you're seeing here is a permission to use HTML5 Canvas Image Data. Do you have resistFingerprinting set to true in about:config? I caught it using Print Screen. Once you give permission, this doorhanger displays quickly while it checks the permissions file. And, it appears to be set to Remember My Choice by default. I had to, very quickly, de-select the Remember box and select Don't Allow. Now, I see the Canvas Image Data icon on the address bar. If I find a way to slow it down, I'll let you know. Setting: privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False in about:config seems to help.
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Question owner

cor-el said

Do you see a Key icon at the left end of the location/address bar to indicate that Firefox may want to store the username and password for this website ? If the doorhanger closes too quickly then you can click the Key icon to reopen the drop-down panel.

No key symbol, probably not that

''cor-el [[#answer-1268728|said]]'' <blockquote> Do you see a Key icon at the left end of the location/address bar to indicate that Firefox may want to store the username and password for this website ? If the doorhanger closes too quickly then you can click the Key icon to reopen the drop-down panel. </blockquote> No key symbol, probably not that
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My_Cheese_Is_Slippin' said

Hi Foxfree99, I think what you're seeing here is a permission to use HTML5 Canvas Image Data. Do you have resistFingerprinting set to true in about:config? I caught it using Print Screen. Once you give permission, this doorhanger displays quickly while it checks the permissions file. And, it appears to be set to Remember My Choice by default. I had to, very quickly, de-select the Remember box and select Don't Allow. Now, I see the Canvas Image Data icon on the address bar. If I find a way to slow it down, I'll let you know. Setting: privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False in about:config seems to help.

Yes, I've got it set to resistFingerprinting in abou:config....

I think this is it--the super quick flash window is what I'm seeing.

Might the speed of this be related to this config?

>privacy.resistFingerprinting.reduceTimerPrecision.microseconds 1000

''My_Cheese_Is_Slippin' [[#answer-1268786|said]]'' <blockquote> Hi Foxfree99, I think what you're seeing here is a permission to use HTML5 Canvas Image Data. Do you have resistFingerprinting set to true in about:config? I caught it using Print Screen. Once you give permission, this doorhanger displays quickly while it checks the permissions file. And, it appears to be set to Remember My Choice by default. I had to, very quickly, de-select the Remember box and select Don't Allow. Now, I see the Canvas Image Data icon on the address bar. If I find a way to slow it down, I'll let you know. Setting: privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False in about:config seems to help. </blockquote> Yes, I've got it set to resistFingerprinting in abou:config.... I think this is it--the super quick flash window is what I'm seeing. Might the speed of this be related to this config? >privacy.resistFingerprinting.reduceTimerPrecision.microseconds 1000
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RobertJ
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I doubt it. 1000 microseconds, or 1 millisecond, isn't long enough to annoy my cataracts. I'm fooling around with settings in a Test profile. I'll let you know.

I doubt it. 1000 microseconds, or 1 millisecond, isn't long enough to annoy my cataracts. I'm fooling around with settings in a Test profile. I'll let you know.
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RobertJ
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I haven't found anything, yet...

When I set up the Test profile, I set: privacy.resistFingerprinting to True and privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False at the same time. The doorhanger displays for about 3 seconds - just long enough for me to de-select the 'Remember' box and select 'Don't Allow'

Maybe, if you set those entries to default, restart Firefox, set them back at the same time and restart Firefox again you'll get the same 3 seconds (???) In the meantime, I'll keep digging.

I haven't found anything, yet... When I set up the Test profile, I set: privacy.resistFingerprinting to True and privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts to False at the same time. The doorhanger displays for about 3 seconds - just long enough for me to de-select the 'Remember' box and select 'Don't Allow' Maybe, if you set those entries to default, restart Firefox, set them back at the same time and restart Firefox again you'll get the same 3 seconds (???) In the meantime, I'll keep digging.
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RobertJ
  • Top 10 Contributor
108 solutions 1189 answers

I found another site (Accuweather. com) where the same doorhanger displays long enough to read it and make selections. I'm not even sure if there is a timeout. So, obviously, because this is happening on other sites at sign-in, the progression to the next page forces it to close. There are a lot of opinions out there that Canvas Mapping is a sneaky way to fingerprint, anyway, that's probably why they put it there.

Another thing - since it's happening at sites that we're signing into - they know who we are. What is there to fingerprint?

Also, keep in mind that these config entries aren't part of the standard Options/Preferences. We might actually be toying with the Future... I mean, these entries might be part of beta testing for future implementation and the complete set of controls aren't available yet.

That's about all that I've got left. Anyone else?

I found another site (Accuweather. com) where the same doorhanger displays long enough to read it and make selections. I'm not even sure if there is a timeout. So, obviously, because this is happening on other sites at sign-in, the progression to the next page forces it to close. There are a lot of opinions out there that Canvas Mapping is a sneaky way to fingerprint, anyway, that's probably why they put it there. Another thing - since it's happening at sites that we're signing into - they know who we are. What is there to fingerprint? Also, keep in mind that these config entries aren't part of the standard Options/Preferences. We might actually be toying with the Future... I mean, these entries might be part of beta testing for future implementation and the complete set of controls aren't available yet. That's about all that I've got left. Anyone else?
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