Copy-edit the AT section.

index.bs

@@ -875,14 +875,14 @@ users at risk include:
     and whether (and which) actors on a page are able to access that information.
 
 <h3 class=question id="accessibility-devices">
-  Does your feature allow sites to learn about the users use of assistive technology?
+  Does your feature allow sites to learn about the user's use of assistive technology?
 </h3>
 The Web is designed to work for everyone, and Web standards should be designed
 for people using assistive technology (<abbr title="assistive technology">AT</abbr>) just as much as for users relying
 on mice, keyboards, and touch screens. Accessibility and universal access
 are core to the W3C's mission.
 
-Specification authors though should keep in mind that Web users that rely on
+Specification authors should keep in mind that Web users who rely on
 assistive technology face some unique risks when using the Web.
 The use of assistive technologies may cause those Web users to stand
 out among other Web users, increasing the risk of unwanted reidentification
@@ -891,18 +891,18 @@ discriminate against Web users who rely on assistive technology.
 
 Feature designers and <abbr title=specification>spec</abbr> authors should therefore be thoughtful and
 careful to limit if, and what, websites can learn about the use of assistive
-technologies. <abbr>Spec</abbr> authors must minimize both what information about
-assistive technology use their features reveal, both explicitly
-and implicitly. Examples of <em>explicit</em> information about assistive technology
+technologies. <abbr>Spec</abbr> authors must minimize the explicit and implicit information that
+their features reveal about assistive technology use.
+Examples of <em>explicit</em> information about assistive technology
 include device identifiers or model names. Examples of <em>implicit</em>
 information about the use of assistive technology might include
 user interaction patterns that are unlikely to be generated by a
 mouse, keyboard, or touch screen.
 
 <p class=example>
-The [[wai-aria-1.3]] defines additional markup authors can use to make
+[[wai-aria-1.3]] defines additional markup authors can use to make
 their pages easier to navigate with assistive technology. The <abbr>spec</abbr>
-includes the [`aria-hidden`](https://w3c.github.io/aria/#aria-hidden)
+includes the <{html-global/aria-hidden}>
 attribute, that site authors can use to indicate that certain content
 should be hidden from assistive technology.
 
@@ -1390,6 +1390,8 @@ urlPrefix: https://privacycg.github.io/storage-access/; spec: STORAGE-ACCESS
     text: third-party context; url: #third-party-context; type: dfn
 urlPrefix: https://html.spec.whatwg.org/multipage/; spec: HTML
     text: PDF viewer plugin objects; url: system-state.html#pdf-viewer-plugin-objects; type: dfn
+urlPrefix: https://www.w3.org/TR/wai-aria-1.3/; spec: wai-aria-1.3
+    text: aria-hidden; for: html-global; url: #aria-hidden; type: element-attr
 </pre>
 
 <pre class="link-defaults">

questionnaire.markdown

@@ -43,5 +43,5 @@ For your convenience, a copy of the questionnaire's questions is included here i
      on future navigations back to the document?
 19.  What happens when a document that uses your feature gets disconnected?
 20.  Does your spec define when and how new kinds of errors should be raised?
-21.  Does your feature allow sites to learn about the users use of assistive technology?
+21.  Does your feature allow sites to learn about the user's use of assistive technology?
 22.  What should this questionnaire have asked?