Far better fix now utilizes a short cooldown window after issuing a speed change command

inject.js

@@ -18,11 +18,6 @@ var tc = {
       vine.co
       imgur.com
       teams.microsoft.com
-    `.replace(regStrip, ""),
-    blacklistrc: `\
-      twitch.tv
-      pluralsight.com
-      teamtreehouse.com
     `.replace(regStrip, "")
   }
 };
@@ -85,8 +80,7 @@ chrome.storage.sync.get(tc.settings, function(storage) {
       startHidden: tc.settings.startHidden,
       enabled: tc.settings.enabled,
       controllerOpacity: tc.settings.controllerOpacity,
-      blacklist: tc.settings.blacklist.replace(regStrip, ""),
-      blacklistrc: tc.settings.blacklistrc.replace(regStrip, "")
+      blacklist: tc.settings.blacklist.replace(regStrip, "")
     });
   }
   tc.settings.lastSpeed = Number(storage.lastSpeed);
@@ -97,7 +91,6 @@ chrome.storage.sync.get(tc.settings, function(storage) {
   tc.settings.startHidden = Boolean(storage.startHidden);
   tc.settings.controllerOpacity = Number(storage.controllerOpacity);
   tc.settings.blacklist = String(storage.blacklist);
-  tc.settings.blacklistrc = String(storage.blacklistrc);
 
   // ensure that there is a "display" binding (for upgrades from versions that had it as a separate binding)
   if (tc.settings.keyBindings.filter(x => x.action == "display").length == 0) {
@@ -344,43 +337,31 @@ function isBlacklisted() {
   return blacklisted;
 }
 
-function isRateChangeBlocked() {
-  blockRateChange = false;
-  tc.settings.blacklistrc.split("\n").forEach(match => {
-    match = match.replace(regStrip, "");
-    if (match.length == 0) {
-      return;
+var coolDown = false;
+function refreshCoolDown() {
+  if (coolDown) {
+    clearTimeout(coolDown);
   }
-    if (match.startsWith("/")) {
-      try {
-        var regexp = new RegExp(match);
-      } catch (err) {
-        return;
-      }
-    } else {
-      var regexp = new RegExp(escapeStringRegExp(match));
-    }
-    if (regexp.test(location.href)) {
-      blockRateChange = true;
-      return;
-    }
-  });
-  return blockRateChange;
+  coolDown = setTimeout(function() {
+    coolDown = false;
+  }, 1000);
 }
 
 function initializeWhenReady(document) {
   if (isBlacklisted()) {
     return;
   }
-  if (isRateChangeBlocked()) {
   document.body.addEventListener(
     "ratechange",
     function(event) {
+      if (coolDown) {
+        refreshCoolDown();
+        console.log("Speed event propagation blocked");
         event.stopImmediatePropagation();
+      }
     },
     true
   );
-  }
   window.onload = () => {
     initializeNow(window.document);
   };
@@ -602,6 +583,7 @@ function setSpeed(controller, video, speed) {
   video.playbackRate = Number(speedvalue);
   var speedIndicator = controller.shadowRoot.querySelector("span");
   speedIndicator.textContent = speedvalue;
+  refreshCoolDown();
 }
 
 function runAction(action, document, value, e) {

options.html

@@ -168,22 +168,6 @@
         </label>
         <textarea id="blacklist" rows="10" cols="50"></textarea>
       </div>
-      <div class="row">
-        <label for="blacklistrc">
-          Sites to forcefully block ratechange listeners<br />
-          (add here if video speed can't be adjusted or "bounces back" after
-          changing)<br />
-          <br />
-          <em>
-            *Important: Use sparingly as this may cause unexpected website and
-            extension behavior.
-          </em>
-          <br />
-          <br />
-          <em><a href="https://www.regexpal.com/">Regex</a> is supported.</em>
-        </label>
-        <textarea id="blacklistrc" rows="10" cols="50"></textarea>
-      </div>
     </section>
 
     <button id="save">Save</button>

options.js

@@ -23,11 +23,6 @@ var tcDefaults = {
     vine.co
     imgur.com
     teams.microsoft.com
-  `.replace(regStrip, ""),
-  blacklistrc: `\
-    twitch.tv
-    pluralsight.com
-    teamtreehouse.com
   `.replace(regStrip, "")
 };
 
@@ -202,24 +197,6 @@ function validate() {
         }
       }
     });
-  document
-    .getElementById("blacklistrc")
-    .value.split("\n")
-    .forEach(match => {
-      match = match.replace(regStrip, "");
-      if (match.startsWith("/")) {
-        try {
-          var regexp = new RegExp(match);
-        } catch (err) {
-          status.textContent =
-            "Error: Invalid ratechange blacklist regex: " +
-            match +
-            ". Unable to save";
-          valid = false;
-          return;
-        }
-      }
-    });
   return valid;
 }
 
@@ -239,7 +216,6 @@ function save_options() {
   var startHidden = document.getElementById("startHidden").checked;
   var controllerOpacity = document.getElementById("controllerOpacity").value;
   var blacklist = document.getElementById("blacklist").value;
-  var blacklistrc = document.getElementById("blacklistrc").value;
 
   chrome.storage.sync.remove([
     "resetSpeed",
@@ -262,8 +238,7 @@ function save_options() {
       startHidden: startHidden,
       controllerOpacity: controllerOpacity,
       keyBindings: keyBindings,
-      blacklist: blacklist.replace(regStrip, ""),
-      blacklistrc: blacklistrc.replace(regStrip, "")
+      blacklist: blacklist.replace(regStrip, "")
     },
     function() {
       // Update status to let user know options were saved.
@@ -286,7 +261,6 @@ function restore_options() {
     document.getElementById("controllerOpacity").value =
       storage.controllerOpacity;
     document.getElementById("blacklist").value = storage.blacklist;
-    document.getElementById("blacklistrc").value = storage.blacklistrc;
 
     // ensure that there is a "display" binding for upgrades from versions that had it as a separate binding
     if (storage.keyBindings.filter(x => x.action == "display").length == 0) {