FX 78.10.1esr displaying FOUC since 11.2.4

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jezjgordon

FX 78.10.1esr displaying FOUC since 11.2.4

Post by jezjgordon » Thu May 06, 2021 11:52 pm

FX 78.10.1esr is displaying FOUC (flash of unformatted content) for any web page I go to, with versions 11.2.6 and 11.2.7. If I disable NS it goes away. When I revert to 11.2.4 it goes away.
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

barbaz
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by barbaz » Fri May 07, 2021 12:40 am

Does the presence of this problem depend on your setting of the "unrestricted CSS" capability for the site you're visiting?
*Always* check the changelogs BEFORE updating that important software!
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therube
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by therube » Fri May 07, 2021 2:58 pm

flash of unformatted content
Not quite sure what you mean by that, but with a (casual) look, I'm not noticing anything out of the ordinary.

Win7 (no Aero), 78.10.1, 11.2.7.rc1.


(I don't think I've done anything to FF [except to maybe turn off some of its spyware] or to NoScript, so I should be pretty much at whatever defaults are.)
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.19) Gecko/20110420 SeaMonkey/2.0.14 Pinball NoScript FlashGot AdblockPlus
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0 SeaMonkey/2.53.8

deutchRx
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by deutchRx » Sat May 08, 2021 11:17 am

Having the same issue. Just started within the past week.

Windows 10 (with April updates) with Firefox 88.0.1 (64-bit) and uBlock Orgin (and NoScript). No other major changes.

Tried to attach an example of "FOUC" - where the text with out much formatting is displayed for .5 - 1 second or so before the page renders, but didn't see an option to attach files. Posted it here - https://easyupload.io/dyjpto

By the way - NoScript is wonderful. Thank you!
Last edited by barbaz on Sat May 08, 2021 2:22 pm, edited 1 time in total.
Reason: removed wrong img tag
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0

barbaz
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by barbaz » Sat May 08, 2021 2:22 pm

barbaz wrote:
Fri May 07, 2021 12:40 am
Does the presence of this problem depend on your setting of the "unrestricted CSS" capability for the site you're visiting?
*Always* check the changelogs BEFORE updating that important software!
-

deutchRx
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Joined: Sat May 08, 2021 10:49 am

Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by deutchRx » Sat May 08, 2021 11:45 pm

The "unrestricted CSS" setting is NOT enabled for any of the sites with this issue.
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0

barbaz
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by barbaz » Sun May 09, 2021 12:18 am

deutchRx wrote:
Sat May 08, 2021 11:45 pm
The "unrestricted CSS" setting is NOT enabled for any of the sites with this issue.
... and (as a test) does enabling it make the issue go away?
*Always* check the changelogs BEFORE updating that important software!
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Giorgio Maone
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by Giorgio Maone » Sun May 09, 2021 6:29 am

deutchRx wrote:
Sat May 08, 2021 11:45 pm
The "unrestricted CSS" setting is NOT enabled for any of the sites with this issue.
Just to be clear, this is quite expected because CSS checks must be (obviously) performed before the styling is actually applied, and in some circumstances this is necessarily be asynchronous, causing the FOUC.
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0

deutchRx
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Re: FX 78.10.1esr displaying FOUC since 11.2.4

Post by deutchRx » Sun May 09, 2021 8:21 am

Enabling "Unrestricted CSS" in the Default settings solved the issue.

I enabled the setting - problem went away; I disabled the setting - problem came back; repeated twice so it seems like that is it.

1. Thank you!

2. Not sure what caused that setting to change. I haven't messed with the NoScript settings in months, maybe even a year.
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0

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