Remove -moz-context-properties CSS property from MDN

[queengooborg]

This PR removes the irrelevant -moz-context-properties CSS property. This a non-standard property that is only supported in internal Firefox code, in other words never exposed for developer use. As such, this is not a property we should document.

BCD PR: mdn/browser-compat-data#15870

[github-actions]

Preview URLs

• https://pr15083.content.dev.mdn.mozit.cloud/en-US/docs/Mozilla/Firefox/Releases/55
• https://pr15083.content.dev.mdn.mozit.cloud/en-US/docs/Web/CSS/Mozilla_Extensions
• https://pr15083.content.dev.mdn.mozit.cloud/en-US/docs/Web/SVG/Attribute/fill
• https://pr15083.content.dev.mdn.mozit.cloud/en-US/docs/Web/SVG/Attribute/stroke

Flaws

Note! 1 document with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/SVG/Attribute/fill
Title: fill
on GitHub
Flaw count: 3

• macros:
  • /en-US/docs/Web/SVG/Element/animateColor redirects to /en-US/docs/Web/SVG/Element/animate
  • /en-US/docs/Web/SVG/Element/animateColor redirects to /en-US/docs/Web/SVG/Element/animate
  • /en-US/docs/Web/SVG/Element/animateColor redirects to /en-US/docs/Web/SVG/Element/animate

---

URL: /en-US/docs/Web/CSS/Mozilla_Extensions
Title: Mozilla CSS extensions
on GitHub
Flaw count: 115

• macros:
  • /en-US/docs/Web/CSS/-moz-binding does not exist
  • /en-US/docs/Web/CSS/-moz-border-bottom-colors does not exist
  • /en-US/docs/Web/CSS/-moz-border-left-colors does not exist
  • /en-US/docs/Web/CSS/-moz-border-right-colors does not exist
  • /en-US/docs/Web/CSS/-moz-border-top-colors does not exist
  • and 88 more flaws omitted
• broken_links:
  • Can't resolve /en-US/docs/Mozilla/Tech/XUL
  • Can't resolve /en-US/docs/Mozilla/Gecko/Chrome/CSS
• heading_links:
  • h3 heading contains an <a> tag
  • h3 heading contains an <a> tag
  • h3 heading contains an <a> tag
  • h3 heading contains an <a> tag
  • h3 heading contains an <a> tag
  • and 15 more flaws omitted

---

URL: /en-US/docs/Mozilla/Firefox/Releases/55
Title: Firefox 55 for developers
on GitHub
Flaw count: 7

• macros:
  • /en-US/docs/Web/CSS/linear-gradient redirects to /en-US/docs/Web/CSS/gradient/linear-gradient
  • /en-US/docs/Web/API/DOMString/href does not exist
  • /en-US/docs/Web/API/WindowProxy does not exist
  • /en-US/docs/Web/API/MediaKeySystemCapabilities does not exist
• broken_links:
  • Can't resolve /en-US/docs/Mozilla/Security/Security_and_the_jar_protocol
  • Can't resolve /en-US/docs/Mozilla/Firefox/Headless_mode
  • Can't resolve /en-US/docs/Archive/B2G_OS/API/Audio_Channels_API

External URLs

URL: /en-US/docs/Web/SVG/Attribute/fill
Title: fill
on GitHub

• https://svgwg.org/specs/animations/ (1 time)
• https://svgwg.org/svg2-draft/painting.html (1 time)
• https://www.w3.org/TR/SVG11/animate.html (1 time)
• https://www.w3.org/TR/SVG11/painting.html (1 time)

---

URL: /en-US/docs/Web/SVG/Attribute/stroke
Title: stroke
on GitHub

• https://svgwg.org/svg2-draft/painting.html (1 time)
• https://www.w3.org/TR/SVG11/painting.html (1 time)

---

URL: /en-US/docs/Web/CSS/Mozilla_Extensions
Title: Mozilla CSS extensions
on GitHub

• https://bugzilla.mozilla.org/show_bug.cgi?id=11011 (1 time)
• https://bugzilla.mozilla.org/show_bug.cgi?id=1306214 (1 time)

---

URL: /en-US/docs/Mozilla/Firefox/Releases/55
Title: Firefox 55 for developers
on GitHub

No new external URLs

[teoli2003]

👍