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Firefox stopped displaying a CSS mask locally

Sergey Martinov
Sergey Martinov
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I use Firefox locally to review the HTML/CSS while creating web pages (Win7 & Win10). Upon browser update, Firefox stopped displaying mask of any image format (SVG or PNG).

I did solve this issue in 2020 by changing the settings. about:config > privacy.file_unique_origin changing: to 'false' > refresh tab. Yet, since October 2021, it's no longer helping. After a browser update, I don't see the images with a mask, see attachment. The mask images show OK when the HTML page is on the server, but codding requires a constant 'quick check,' and usually uploading to the server is a final step. Can anyone help?

I prepared a simple example page [https://artenergy.com/mask] with a download link. Thus one can open this file locally to see the issue.

Thank you!

I use Firefox locally to review the HTML/CSS while creating web pages (Win7 & Win10). Upon browser update, Firefox stopped displaying mask of any image format (SVG or PNG). I did solve this issue in 2020 by changing the settings. about:config > privacy.file_unique_origin changing: to 'false' > refresh tab. Yet, since October 2021, it's no longer helping. After a browser update, I don't see the images with a mask, see attachment. The mask images show OK when the HTML page is on the server, but codding requires a constant 'quick check,' and usually uploading to the server is a final step. Can anyone help? I prepared a simple example page [[https://artenergy.com/mask]] with a download link. Thus one can open this file locally to see the issue. Thank you!
첨부된 스크린샷

글쓴이 Sergey Martinov 수정일시

선택된 해결법

This pref is still supported, but will be removed as well in the future.

  • security.fileuri.strict_origin_policy = false

Safest is to use a separate profile with this feature disabled for testing locally.

  • 1730535 - Remove the security.fileuri.strict_origin_policy pref, always require unique origins

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

문맥에 따라 이 답변을 읽어주세요 👍 1

모든 댓글 (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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선택된 해결법

This pref is still supported, but will be removed as well in the future.

  • security.fileuri.strict_origin_policy = false

Safest is to use a separate profile with this feature disabled for testing locally.

  • 1730535 - Remove the security.fileuri.strict_origin_policy pref, always require unique origins

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Sergey Martinov
Sergey Martinov 질문자
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Thank you much, this did the trick, and now I can see the 'mask image' again. Your help is appreciated a lot!