Shot has no expire date on some websites

[Zitronella]

in advance: sorry for my bad english. But the .gif screenhot will show you to understand better.

• I started i fresh firefox profile (firefox 55.0.1 64bit under Win7 prof. 64bit)
• in about:config i set extensions.screenshots.system-disabled to false
• i reload the site https://www.camp-firefox.de/forum/ and made a screenshot --> a short popup with expire date, and then it dissapered.
• i relaod site https://www.twodns.de/ the expire date remains

You can see the behavior in the gif

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[Zitronella]

when created the gif i forgot to reload https://www.twodns.de/ but this is not from relevance. The wrong behavior is the same.

[Zitronella]

The problem is also on nightly 57.0a1 (2017-08-15) (64-Bit)
with Firefox Screenshots 10.12.0

[johngruen]

See also #2860

[jaredhirsch]

Based on the console error, this seems related to #3255

[ianb]

I wonder if this is really a dup of #3581 ?

[johngruen]

We think this will be fixed when #3667 is patched. @SoftVision-CosminMuntean will confirm

[SoftVision-CosminMuntean]

I can reproduce the issue on latest Nightly 58.0a1 build with Screenshots 19.2.0, but is not reproducible with latest Screeshots (23.0.0) dev version.
The user can reproduce the issue on "https://www.camp-firefox.de/forum/" website, but not on "https://www.twodns.de/" website. The only difference is that the website domain have a hyphen in it, so I think that the issue is fixed in #3667.