Proposal: Multiple user script worlds (#560)

SHA: 5869199
Reason: push, by Rob--W

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: rdcronin

specification/index.html

@@ -7,7 +7,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
   <meta content="Bikeshed version 82ce88815, updated Thu Sep 7 16:33:55 2023 -0700" name="generator">
   <link href="https://w3c.github.io/webextensions" rel="canonical">
-  <meta content="d99619c0b72b8bcd4c87b628755683080a233dfc" name="document-revision">
+  <meta content="5869199abf154983fe458f01d44a6e330dc30fa5" name="document-revision">
 <style>/* Boilerplate: style-autolinks */
 .css.css, .property.property, .descriptor.descriptor {
     color: var(--a-normal-text);