diff --git a/src/App.vue b/src/App.vue
index e0d709f7..8dad8ce9 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -33,7 +33,7 @@
           <div id="notifs-sidebar" />
         </template>
       </div>
-      <div
+      <main
         id="main-scroller"
         class="column main"
         :class="{ '-full-height': isChats || isListEdit }"
@@ -50,7 +50,7 @@
           </router-link>
         </div>
         <router-view />
-      </div>
+      </main>
       <div
         id="notifs-column"
         class="column -scrollable"
diff --git a/src/components/conversation/conversation.vue b/src/components/conversation/conversation.vue
index 3752e3c1..afa04db0 100644
--- a/src/components/conversation/conversation.vue
+++ b/src/components/conversation/conversation.vue
@@ -60,7 +60,7 @@
           v-if="shouldShowAncestors"
           class="thread-ancestors"
         >
-          <div
+          <article
             v-for="status in ancestorsOf(diveRoot)"
             :key="status.id"
             class="thread-ancestor"
@@ -130,7 +130,7 @@
                 </i18n-t>
               </div>
             </div>
-          </div>
+          </article>
         </div>
         <thread-tree
           v-for="status in showingTopLevel"
@@ -168,34 +168,36 @@
         v-if="isLinearView"
         class="thread-body"
       >
-        <status
-          v-for="status in conversation"
-          :key="status.id"
-          ref="statusComponent"
-          :inline-expanded="collapsable && isExpanded"
-          :statusoid="status"
-          :expandable="!isExpanded"
-          :show-pinned="pinnedStatusIdsObject && pinnedStatusIdsObject[status.id]"
-          :focused="focused(status.id)"
-          :in-conversation="isExpanded"
-          :highlight="getHighlight()"
-          :replies="getReplies(status.id)"
-          :in-profile="inProfile"
-          :profile-user-id="profileUserId"
-          class="conversation-status status-fadein panel-body"
+        <article>
+          <status
+            v-for="status in conversation"
+            :key="status.id"
+            ref="statusComponent"
+            :inline-expanded="collapsable && isExpanded"
+            :statusoid="status"
+            :expandable="!isExpanded"
+            :show-pinned="pinnedStatusIdsObject && pinnedStatusIdsObject[status.id]"
+            :focused="focused(status.id)"
+            :in-conversation="isExpanded"
+            :highlight="getHighlight()"
+            :replies="getReplies(status.id)"
+            :in-profile="inProfile"
+            :profile-user-id="profileUserId"
+            class="conversation-status status-fadein panel-body"
 
-          :toggle-thread-display="toggleThreadDisplay"
-          :thread-display-status="threadDisplayStatus"
-          :show-thread-recursively="showThreadRecursively"
-          :total-reply-count="totalReplyCount"
-          :total-reply-depth="totalReplyDepth"
-          :status-content-properties="statusContentProperties"
-          :set-status-content-property="setStatusContentProperty"
-          :toggle-status-content-property="toggleStatusContentProperty"
+            :toggle-thread-display="toggleThreadDisplay"
+            :thread-display-status="threadDisplayStatus"
+            :show-thread-recursively="showThreadRecursively"
+            :total-reply-count="totalReplyCount"
+            :total-reply-depth="totalReplyDepth"
+            :status-content-properties="statusContentProperties"
+            :set-status-content-property="setStatusContentProperty"
+            :toggle-status-content-property="toggleStatusContentProperty"
 
-          @goto="setHighlight"
-          @toggleExpanded="toggleExpanded"
-        />
+            @goto="setHighlight"
+            @toggleExpanded="toggleExpanded"
+          />
+        </article>
       </div>
     </div>
   </div>
diff --git a/src/components/mobile_nav/mobile_nav.vue b/src/components/mobile_nav/mobile_nav.vue
index 264bc713..6e732d1f 100644
--- a/src/components/mobile_nav/mobile_nav.vue
+++ b/src/components/mobile_nav/mobile_nav.vue
@@ -10,6 +10,8 @@
       <div class="item">
         <button
           class="button-unstyled mobile-nav-button"
+          :title="$t('nav.mobile_sidebar')"
+          :aria-expanaded="this.$refs.sideDrawer && !this.$refs.sideDrawer.closed"
           @click.stop.prevent="toggleMobileSidebar()"
         >
           <FAIcon
@@ -26,6 +28,7 @@
         <button
           v-if="currentUser"
           class="button-unstyled mobile-nav-button"
+          :title="unseenNotificationsCount ? $t('nav.mobile_notifications_unread_active') : $t('nav.mobile_notifications')"
           @click.stop.prevent="openMobileNotifications()"
         >
           <FAIcon
@@ -39,7 +42,7 @@
         </button>
       </div>
     </nav>
-    <div
+    <aside
       v-if="currentUser"
       class="mobile-notifications-drawer"
       :class="{ '-closed': !notificationsOpen }"
@@ -52,6 +55,7 @@
         <button
           v-if="notificationsAtTop"
           class="button-unstyled mobile-nav-button"
+          :title="$t('general.scroll_to_top')"
           @click.stop.prevent="scrollMobileNotificationsToTop"
         >
           <FALayers class="fa-scale-110 fa-old-padding-layer">
@@ -64,6 +68,7 @@
         </button>
         <button
           class="button-unstyled mobile-nav-button"
+          :title="$t('nav.mobile_notifications_close')"
           @click.stop.prevent="closeMobileNotifications(true)"
         >
           <FAIcon
@@ -78,7 +83,7 @@
         ref="mobileNotifications"
         @scroll="onScroll"
       />
-    </div>
+    </aside>
     <SideDrawer
       ref="sideDrawer"
       :logout="logout"
diff --git a/src/components/mobile_post_status_button/mobile_post_status_button.vue b/src/components/mobile_post_status_button/mobile_post_status_button.vue
index 9fcdf6f8..28a2c440 100644
--- a/src/components/mobile_post_status_button/mobile_post_status_button.vue
+++ b/src/components/mobile_post_status_button/mobile_post_status_button.vue
@@ -3,6 +3,7 @@
     v-if="isLoggedIn"
     class="MobilePostButton button-default new-status-button"
     :class="{ 'hidden': isHidden, 'always-show': isPersistent }"
+    :title="$t('post_status.new_status')"
     @click="openPostForm"
   >
     <FAIcon icon="pen" />
diff --git a/src/components/notification/notification.vue b/src/components/notification/notification.vue
index 26b174ff..84f3f7de 100644
--- a/src/components/notification/notification.vue
+++ b/src/components/notification/notification.vue
@@ -1,11 +1,14 @@
 <template>
-  <Status
+  <article
     v-if="notification.type === 'mention'"
-    class="Notification"
-    :compact="true"
-    :statusoid="notification.status"
-  />
-  <div v-else>
+  >
+    <Status
+      class="Notification"
+      :compact="true"
+      :statusoid="notification.status"
+    />
+  </article>
+  <article v-else>
     <div
       v-if="needMute && !unmuted"
       class="Notification container -muted"
@@ -226,7 +229,7 @@
         </template>
       </div>
     </div>
-  </div>
+  </article>
 </template>
 
 <script src="./notification.js"></script>
diff --git a/src/components/notifications/notifications.vue b/src/components/notifications/notifications.vue
index f9c90a7e..3d5878d4 100644
--- a/src/components/notifications/notifications.vue
+++ b/src/components/notifications/notifications.vue
@@ -3,7 +3,8 @@
     :disabled="minimalMode || disableTeleport"
     :to="teleportTarget"
   >
-    <div
+    <component
+      :is="noHeading ? 'div' : 'aside'"
       ref="root"
       :class="{ minimal: minimalMode }"
       class="Notifications"
@@ -49,10 +50,14 @@
           </button>
           <NotificationFilters class="rightside-button" />
         </div>
-        <div class="panel-body">
+        <div
+          class="panel-body"
+          role="feed"
+        >
           <div
             v-for="notification in notificationsToDisplay"
             :key="notification.id"
+            role="listitem"
             class="notification"
             :class="{unseen: !minimalMode && !notification.seen}"
           >
@@ -88,7 +93,7 @@
           </div>
         </div>
       </div>
-    </div>
+    </component>
   </teleport>
 </template>
 
diff --git a/src/components/popover/popover.js b/src/components/popover/popover.js
index dd332c35..72b7c511 100644
--- a/src/components/popover/popover.js
+++ b/src/components/popover/popover.js
@@ -43,7 +43,12 @@ const Popover = {
     overlayCentersSelector: String,
 
     // Lets hover popover stay when clicking inside of it
-    stayOnClick: Boolean
+    stayOnClick: Boolean,
+
+    triggerAttrs: {
+      type: Object,
+      default: {}
+    }
   },
   inject: ['popoversZLayer'], // override popover z layer
   data () {
diff --git a/src/components/popover/popover.vue b/src/components/popover/popover.vue
index 623af8d2..9506728e 100644
--- a/src/components/popover/popover.vue
+++ b/src/components/popover/popover.vue
@@ -7,6 +7,7 @@
       ref="trigger"
       class="button-unstyled popover-trigger-button"
       type="button"
+      v-bind="triggerAttrs"
       @click="onClick"
     >
       <slot name="trigger" />
diff --git a/src/components/quick_filter_settings/quick_filter_settings.vue b/src/components/quick_filter_settings/quick_filter_settings.vue
index 54ea037e..87fcd716 100644
--- a/src/components/quick_filter_settings/quick_filter_settings.vue
+++ b/src/components/quick_filter_settings/quick_filter_settings.vue
@@ -3,6 +3,7 @@
     trigger="click"
     class="QuickFilterSettings"
     :bound-to="{ x: 'container' }"
+    :triggerAttrs="{ title: $t('timeline.quick_filter_settings') }"
   >
     <template #content>
       <div class="dropdown-menu">
@@ -79,9 +80,7 @@
       </div>
     </template>
     <template #trigger>
-      <button class="button-unstyled">
-        <FAIcon icon="filter" />
-      </button>
+      <FAIcon icon="filter" />
     </template>
   </Popover>
 </template>
diff --git a/src/components/quick_view_settings/quick_view_settings.vue b/src/components/quick_view_settings/quick_view_settings.vue
index b0413cac..d7c9bf3b 100644
--- a/src/components/quick_view_settings/quick_view_settings.vue
+++ b/src/components/quick_view_settings/quick_view_settings.vue
@@ -3,6 +3,7 @@
     trigger="click"
     class="QuickViewSettings"
     :bound-to="{ x: 'container' }"
+    :triggerAttrs="{ title: $t('timeline.quick_view_settings') }"
   >
     <template #content>
       <div class="dropdown-menu">
@@ -66,9 +67,7 @@
       </div>
     </template>
     <template #trigger>
-      <button class="button-unstyled">
-        <FAIcon icon="bars" />
-      </button>
+      <FAIcon icon="bars" />
     </template>
   </Popover>
 </template>
diff --git a/src/components/thread_tree/thread_tree.vue b/src/components/thread_tree/thread_tree.vue
index 4eaf597d..c6fffc71 100644
--- a/src/components/thread_tree/thread_tree.vue
+++ b/src/components/thread_tree/thread_tree.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="thread-tree">
+  <article class="thread-tree">
     <status
       :key="status.id"
       ref="statusComponent"
@@ -113,7 +113,7 @@
         </template>
       </i18n-t>
     </div>
-  </div>
+  </article>
 </template>
 
 <script src="./thread_tree.js"></script>
diff --git a/src/components/timeline/timeline.vue b/src/components/timeline/timeline.vue
index 8a036fd0..877a0cc0 100644
--- a/src/components/timeline/timeline.vue
+++ b/src/components/timeline/timeline.vue
@@ -47,6 +47,7 @@
           v-else-if="!embedded"
           class="loadmore-text faint veryfaint rightside-icon"
           :title="$t('timeline.up_to_date')"
+          :aria-disabled="true"
           @click.prevent
         >
           <FAIcon
@@ -78,10 +79,12 @@
       <div
         ref="timeline"
         class="timeline"
+        role="feed"
       >
         <conversation
           v-for="statusId in filteredPinnedStatusIds"
           :key="statusId + '-pinned'"
+          role="listitem"
           class="status-fadein"
           :status-id="statusId"
           :collapsable="true"
@@ -92,6 +95,7 @@
         <conversation
           v-for="status in filteredVisibleStatuses"
           :key="status.id"
+          role="listitem"
           class="status-fadein"
           :status-id="status.id"
           :collapsable="true"
diff --git a/src/components/user_panel/user_panel.vue b/src/components/user_panel/user_panel.vue
index 243de387..95ec97af 100644
--- a/src/components/user_panel/user_panel.vue
+++ b/src/components/user_panel/user_panel.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="user-panel">
+  <aside class="user-panel">
     <div
       v-if="signedIn"
       key="user-panel-signed"
@@ -16,7 +16,7 @@
       v-else
       key="user-panel"
     />
-  </div>
+  </aside>
 </template>
 
 <script src="./user_panel.js"></script>
diff --git a/src/i18n/en.json b/src/i18n/en.json
index 246e22cf..6aa24b1c 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -158,7 +158,11 @@
     "lists": "Lists",
     "edit_nav_mobile": "Customize navigation bar",
     "edit_pinned": "Edit pinned items",
-    "edit_finish": "Done editing"
+    "edit_finish": "Done editing",
+    "mobile_sidebar": "Toggle mobile sidebar",
+    "mobile_notifications": "Open notifications",
+    "mobile_notifications": "Open notifications (there are unread ones)",
+    "mobile_notifications_close": "Close notifications"
   },
   "notifications": {
     "broken_favorite": "Unknown status, searching for it…",
@@ -807,7 +811,9 @@
     "no_more_statuses": "No more statuses",
     "no_statuses": "No statuses",
     "socket_reconnected": "Realtime connection established",
-    "socket_broke": "Realtime connection lost: CloseEvent code {0}"
+    "socket_broke": "Realtime connection lost: CloseEvent code {0}",
+    "quick_view_settings": "Quick view settings",
+    "quick_filter_settings": "Quick filter settings"
   },
   "status": {
     "favorites": "Favorites",