diff --git a/background.js b/background.js
index 0ce1c4d4e..0b9c0cadf 100644
--- a/background.js
+++ b/background.js
@@ -12,212 +12,230 @@
 # LOCALE
 --------------------------------------------------------------*/
 
-
 function getLocale(language, callback) {
-	language = language.replace('-', '_');
-
-	fetch('_locales/' + language + '/messages.json').then(function (response) {
-		if (response.ok) {
-			response.json().then(callback);
-		} else {
-			getLocale('en', callback);
-		}
-	}).catch(function () {
-		getLocale('en', callback);
-	});
+  language = language.replace("-", "_");
+
+  fetch("_locales/" + language + "/messages.json")
+    .then(function (response) {
+      if (response.ok) {
+        response.json().then(callback);
+      } else {
+        getLocale("en", callback);
+      }
+    })
+    .catch(function () {
+      getLocale("en", callback);
+    });
 }
 
-
 /*--------------------------------------------------------------
 # CONTEXT MENU
 --------------------------------------------------------------*/
 
 function updateContextMenu(language) {
-	if (!language) {
-		language = chrome.i18n.getUILanguage();
-	}
-
-	getLocale(language, function (response) {
-		var items = [
-			'donate',
-			'rateMe',
-			'GitHub'
-		];
-
-		chrome.contextMenus.removeAll();
-
-		for (var i = 0; i < 3; i++) {
-			var item = items[i],
-				text = response[item];
-
-			if (text) {
-				text = text.message;
-			} else {
-				text = item;
-			}
-
-			chrome.contextMenus.create({
-				id: String(i),
-				title: text,
-				contexts: ['action']
-			});
-		}
-
-		chrome.contextMenus.onClicked.addListener(function (info) {
-			var links = [
-				'https://www.improvedtube.com/donate',
-				'https://chrome.google.com/webstore/detail/improve-youtube-video-you/bnomihfieiccainjcjblhegjgglakjdd',
-				'https://github.com/code4charity/YouTube-Extension'
-			];
-
-			window.open(links[info.menuItemId]);
-		});
-	});
+  if (!language) {
+    language = chrome.i18n.getUILanguage();
+  }
+
+  getLocale(language, function (response) {
+    var items = ["donate", "rateMe", "GitHub"];
+
+    chrome.contextMenus.removeAll();
+
+    for (var i = 0; i < 3; i++) {
+      var item = items[i],
+        text = response[item];
+
+      if (text) {
+        text = text.message;
+      } else {
+        text = item;
+      }
+
+      chrome.contextMenus.create({
+        id: String(i),
+        title: text,
+        contexts: ["action"],
+      });
+    }
+
+    chrome.contextMenus.onClicked.addListener(function (info) {
+      var links = [
+        "https://www.improvedtube.com/donate",
+        "https://chrome.google.com/webstore/detail/improve-youtube-video-you/bnomihfieiccainjcjblhegjgglakjdd",
+        "https://github.com/code4charity/YouTube-Extension",
+      ];
+
+      window.open(links[info.menuItemId]);
+    });
+  });
 }
 
 chrome.runtime.onInstalled.addListener(function (details) {
-	chrome.storage.local.get(function (items) {
-		var language = items.language;
+  chrome.storage.local.get(function (items) {
+    var language = items.language;
 
-		updateContextMenu(language);
-	});
+    updateContextMenu(language);
+  });
 });
 
 chrome.storage.onChanged.addListener(function (changes) {
-	for (var key in changes) {
-		if (key === 'language') {
-			updateContextMenu(changes[key].newValue);
-		}
-	}
+  for (var key in changes) {
+    if (key === "language") {
+      updateContextMenu(changes[key].newValue);
+    }
+  }
 });
 
-
 /*--------------------------------------------------------------
 # TAB FOCUS/BLUR
 --------------------------------------------------------------*/
 
 chrome.tabs.onActivated.addListener(function (activeInfo) {
-	chrome.tabs.sendMessage(activeInfo.tabId, {
-		action: 'focus'
-	});
-
-	chrome.tabs.query({
-		windowId: activeInfo.windowId
-	}, function (tabs) {
-		if (tabs) {
-			for (var i = 0, l = tabs.length; i < l; i++) {
-				if (tabs[i].id !== activeInfo.tabId) {
-					chrome.tabs.sendMessage(tabs[i].id, {
-						action: 'blur'
-					});
-				}
-			}
-		}
-	});
+  chrome.tabs.sendMessage(activeInfo.tabId, {
+    action: "focus",
+  });
+
+  chrome.tabs.query(
+    {
+      windowId: activeInfo.windowId,
+    },
+    function (tabs) {
+      if (tabs) {
+        for (var i = 0, l = tabs.length; i < l; i++) {
+          if (tabs[i].id !== activeInfo.tabId) {
+            chrome.tabs.sendMessage(tabs[i].id, {
+              action: "blur",
+            });
+          }
+        }
+      }
+    }
+  );
 });
 
 chrome.windows.onFocusChanged.addListener(function (windowId) {
-	chrome.windows.getAll(function (windows) {
-		for (var i = 0, l = windows.length; i < l; i++) {
-			if (windows[i].focused === true) {
-				chrome.tabs.query({
-					windowId: windows[i].id
-				}, function (tabs) {
-					if (tabs) {
-						for (var j = 0, k = tabs.length; j < k; j++) {
-							var tab = tabs[j];
-
-							if (tab.active) {
-								chrome.tabs.sendMessage(tab.id, {
-									action: 'focus'
-								});
-							}
-						}
-					}
-				});
-			} else {
-				chrome.tabs.query({
-					windowId: windows[i].id
-				}, function (tabs) {
-					if (tabs) {
-						for (var j = 0, k = tabs.length; j < k; j++) {
-							var tab = tabs[j];
-
-							chrome.tabs.sendMessage(tab.id, {
-								action: 'blur'
-							});
-						}
-					}
-				});
-			}
-		}
-	});
+  chrome.windows.getAll(function (windows) {
+    for (var i = 0, l = windows.length; i < l; i++) {
+      if (windows[i].focused === true) {
+        chrome.tabs.query(
+          {
+            windowId: windows[i].id,
+          },
+          function (tabs) {
+            if (tabs) {
+              for (var j = 0, k = tabs.length; j < k; j++) {
+                var tab = tabs[j];
+
+                if (tab.active) {
+                  chrome.tabs.sendMessage(tab.id, {
+                    action: "focus",
+                  });
+                }
+              }
+            }
+          }
+        );
+      } else {
+        chrome.tabs.query(
+          {
+            windowId: windows[i].id,
+          },
+          function (tabs) {
+            if (tabs) {
+              for (var j = 0, k = tabs.length; j < k; j++) {
+                var tab = tabs[j];
+
+                chrome.tabs.sendMessage(tab.id, {
+                  action: "blur",
+                });
+              }
+            }
+          }
+        );
+      }
+    }
+  });
 });
 
-
 /*--------------------------------------------------------------
 # MESSAGE LISTENER
 --------------------------------------------------------------*/
 
 chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
-	var name = request.name;
-
-	if (name === 'download') {
-		chrome.permissions.request({
-			permissions: ['downloads'],
-			origins: ['https://www.youtube.com/*']
-		}, function (granted) {
-			if (granted) {
-				try {
-					var blob = new Blob([JSON.stringify(request.value)], {
-						type: 'application/json;charset=utf-8'
-					});
-
-					chrome.downloads.download({
-						url: URL.createObjectURL(blob),
-						filename: request.filename,
-						saveAs: true
-					});
-				} catch (error) {
-					console.error(error);
-				}
-			} else {
-				console.error('Permission is not granted.');
-			}
-		});
-	}
+  var name = request.name;
+
+  if (name === "download") {
+    chrome.permissions.request(
+      {
+        permissions: ["downloads"],
+        origins: ["https://www.youtube.com/*"],
+      },
+      function (granted) {
+        if (granted) {
+          try {
+            var blob = new Blob([JSON.stringify(request.value)], {
+              type: "application/json;charset=utf-8",
+            });
+
+            chrome.downloads.download({
+              url: URL.createObjectURL(blob),
+              filename: request.filename,
+              saveAs: true,
+            });
+          } catch (error) {
+            console.error(error);
+          }
+        } else {
+          console.error("Permission is not granted.");
+        }
+      }
+    );
+  }
 });
 
+let prevTabsLength = 0;
+
 chrome.runtime.onMessage.addListener(function (message, sender, sendResponse) {
-	var action = message.action || message;
-
-	if (action === 'play') {
-		chrome.tabs.query({}, function (tabs) {
-			for (var i = 0, l = tabs.length; i < l; i++) {
-				var tab = tabs[i];
-
-				if (sender.tab.id !== tab.id) {
-					chrome.tabs.sendMessage(tab.id, {
-						action: 'another-video-started-playing'
-					});
-				}
-			}
-		});
-	} else if (action === 'options-page-connected') {
-		sendResponse({
-			isTab: sender.hasOwnProperty('tab')
-		});
-	} else if (action === 'tab-connected') {
-		sendResponse({
-			hostname: new URL(sender.url).hostname,
-			tabId: sender.tab.id
-		});
-	}
+  var action = message.action || message;
+
+  if (action === "play") {
+    chrome.tabs.query({}, function (tabs) {
+      if (tabs.length > prevTabsLength) {
+        prevTabsLength = tabs.length;
+        for (var i = 0, l = tabs.length; i < l; i++) {
+          var tab = tabs[i];
+          chrome.tabs.sendMessage(tab.id, {
+            action: "new-tab-opened",
+          });
+        }
+      } else {
+        prevTabsLength = tabs.length;
+      }
+      for (var i = 0, l = tabs.length; i < l; i++) {
+        var tab = tabs[i];
+
+        if (sender.tab.id !== tab.id) {
+          chrome.tabs.sendMessage(tab.id, {
+            action: "another-video-started-playing",
+          });
+        }
+      }
+    });
+  } else if (action === "options-page-connected") {
+    sendResponse({
+      isTab: sender.hasOwnProperty("tab"),
+    });
+  } else if (action === "tab-connected") {
+    sendResponse({
+      hostname: new URL(sender.url).hostname,
+      tabId: sender.tab.id,
+    });
+  }
 });
 
-
 /*--------------------------------------------------------------
 # UNINSTALL URL
 --------------------------------------------------------------*/
 
-chrome.runtime.setUninstallURL('https://improvedtube.com/uninstalled');
+chrome.runtime.setUninstallURL("https://improvedtube.com/uninstalled");
diff --git a/content-scripts/extension-context/init.js b/content-scripts/extension-context/init.js
index b5e2f21e6..47b51ee4a 100644
--- a/content-scripts/extension-context/init.js
+++ b/content-scripts/extension-context/init.js
@@ -2,232 +2,260 @@
 >>> INITIALIZATION
 --------------------------------------------------------------*/
 
-extension.features.youtubeHomePage('init');
+extension.features.youtubeHomePage("init");
 
-document.documentElement.setAttribute('it-pathname', location.pathname);
+document.documentElement.setAttribute("it-pathname", location.pathname);
 
-window.addEventListener('yt-navigate-finish', function () {
-	document.documentElement.setAttribute('it-pathname', location.pathname);
+window.addEventListener("yt-navigate-finish", function () {
+  document.documentElement.setAttribute("it-pathname", location.pathname);
 
-	extension.features.trackWatchedVideos();
-	extension.features.thumbnailsQuality();
+  extension.features.trackWatchedVideos();
+  extension.features.thumbnailsQuality();
 });
 
 extension.messages.create();
 extension.messages.listener();
 
-extension.events.on('init', function (resolve) {
-	extension.storage.listener();
-	extension.storage.load(function () {
-		resolve();
-	});
-}, {
-	async: true
-});
+extension.events.on(
+  "init",
+  function (resolve) {
+    extension.storage.listener();
+    extension.storage.load(function () {
+      resolve();
+    });
+  },
+  {
+    async: true,
+  }
+);
 
 function bodyReady() {
-	if (extension.ready && extension.domReady) {
-		extension.features.addScrollToTop();
-		extension.features.font();
-		extension.features.showHeaderOnSearch();
-	}
+  if (extension.ready && extension.domReady) {
+    extension.features.addScrollToTop();
+    extension.features.font();
+    extension.features.showHeaderOnSearch();
+  }
 }
 
-extension.events.on('init', function () {
-	extension.features.bluelight();
-	extension.features.dim();
-	extension.features.youtubeHomePage();
-	extension.features.collapseOfSubscriptionSections();
-	extension.features.confirmationBeforeClosing();
-	extension.features.defaultContentCountry();
-	extension.features.popupWindowButtons();
-	extension.features.markWatchedVideos();
-	extension.features.relatedVideos();
-	extension.features.comments();
-
-	bodyReady();
-});
-
-chrome.runtime.sendMessage({
-	action: 'tab-connected'
-}, function (response) {
-	if (response) {
-		extension.tabId = response.tabId;
-	}
+extension.events.on("init", function () {
+  extension.features.bluelight();
+  extension.features.dim();
+  extension.features.youtubeHomePage();
+  extension.features.collapseOfSubscriptionSections();
+  extension.features.confirmationBeforeClosing();
+  extension.features.defaultContentCountry();
+  extension.features.popupWindowButtons();
+  extension.features.markWatchedVideos();
+  extension.features.relatedVideos();
+  extension.features.comments();
+
+  bodyReady();
 });
 
-extension.inject([
-	'/content-scripts/website-context/core.js',
-	'/content-scripts/website-context/functions.js',
-	'/content-scripts/website-context/youtube-features/appearance.js',
-	'/content-scripts/website-context/youtube-features/themes.js',
-	'/content-scripts/website-context/youtube-features/player.js',
-	'/content-scripts/website-context/youtube-features/playlist.js',
-	'/content-scripts/website-context/youtube-features/channel.js',
-	'/content-scripts/website-context/youtube-features/shortcuts.js',
-	'/content-scripts/website-context/youtube-features/blacklist.js',
-	'/content-scripts/website-context/youtube-features/settings.js',
-	'/content-scripts/website-context/init.js',
-	'/content-scripts/website-context/mutations.js'
-], function () {
-	extension.ready = true;
-
-	extension.events.trigger('init');
-});
-
-document.addEventListener('DOMContentLoaded', function () {
-	extension.domReady = true;
-
-	bodyReady();
+chrome.runtime.sendMessage(
+  {
+    action: "tab-connected",
+  },
+  function (response) {
+    if (response) {
+      extension.tabId = response.tabId;
+    }
+  }
+);
+
+extension.inject(
+  [
+    "/content-scripts/website-context/core.js",
+    "/content-scripts/website-context/functions.js",
+    "/content-scripts/website-context/youtube-features/appearance.js",
+    "/content-scripts/website-context/youtube-features/themes.js",
+    "/content-scripts/website-context/youtube-features/player.js",
+    "/content-scripts/website-context/youtube-features/playlist.js",
+    "/content-scripts/website-context/youtube-features/channel.js",
+    "/content-scripts/website-context/youtube-features/shortcuts.js",
+    "/content-scripts/website-context/youtube-features/blacklist.js",
+    "/content-scripts/website-context/youtube-features/settings.js",
+    "/content-scripts/website-context/init.js",
+    "/content-scripts/website-context/mutations.js",
+  ],
+  function () {
+    extension.ready = true;
+
+    extension.events.trigger("init");
+  }
+);
+
+document.addEventListener("DOMContentLoaded", function () {
+  extension.domReady = true;
+
+  bodyReady();
 });
 
+let prevRequestAction = "";
 chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
-	if (request.action === 'focus') {
-		extension.messages.send({
-			focus: true
-		});
-	} else if (request.action === 'blur') {
-		extension.messages.send({
-			blur: true
-		});
-	} else if (request.action === 'pause') {
-		extension.messages.send({
-			pause: true
-		});
-	} else if (request.action === 'set-volume') {
-		extension.messages.send({
-			setVolume: request.value
-		});
-	} else if (request.action === 'set-playback-speed') {
-		extension.messages.send({
-			setPlaybackSpeed: request.value
-		});
-	} else if (request.action === 'mixer') {
-		extension.messages.send({
-			mixer: true
-		}, sendResponse, 'mixer');
-
-		return true;
-	} else if (request.action === 'delete-youtube-cookies') {
-		extension.messages.send({
-			deleteCookies: true
-		});
-	} else if (request.action === 'another-video-started-playing') {
-		extension.features.onlyOnePlayerInstancePlaying();
-	}
+  if (request.action === "focus") {
+    extension.messages.send({
+      focus: true,
+    });
+  } else if (request.action === "blur") {
+    extension.messages.send({
+      blur: true,
+    });
+  } else if (request.action === "pause") {
+    extension.messages.send({
+      pause: true,
+    });
+  } else if (request.action === "set-volume") {
+    extension.messages.send({
+      setVolume: request.value,
+    });
+  } else if (request.action === "set-playback-speed") {
+    extension.messages.send({
+      setPlaybackSpeed: request.value,
+    });
+  } else if (request.action === "mixer") {
+    extension.messages.send(
+      {
+        mixer: true,
+      },
+      sendResponse,
+      "mixer"
+    );
+
+    return true;
+  } else if (request.action === "delete-youtube-cookies") {
+    extension.messages.send({
+      deleteCookies: true,
+    });
+  } else if (
+    request.action === "another-video-started-playing" &&
+    prevRequestAction === "new-tab-opened"
+  ) {
+    console.log("Continue playing");
+  } else if (request.action === "another-video-started-playing") {
+    extension.features.onlyOnePlayerInstancePlaying();
+  }
+
+  prevRequestAction = request.action;
 });
 
-document.addEventListener('it-message-from-youtube', function () {
-	var provider = document.querySelector('#it-messages-from-youtube');
-
-	if (provider) {
-		var message = provider.textContent;
-
-		document.dispatchEvent(new CustomEvent('it-message-from-youtube--readed'));
-
-		try {
-			message = JSON.parse(message);
-		} catch (error) {
-			console.log(error);
-		}
-
-		//console.log(message);
-
-		if (message.requestOptionsUrl === true) {
-			extension.messages.send({
-				responseOptionsUrl: chrome.runtime.getURL('options-page/index.html')
-			});
-		} else if (message.onlyOnePlayer === true) {
-			chrome.runtime.sendMessage({
-				name: 'only-one-player'
-			});
-		} else if (message.action === 'analyzer') {
-			if (extension.storage.data.analyzer_activation === true) {
-				var data = message.name,
-					date = new Date().toDateString(),
-					hours = new Date().getHours() + ':00';
-
-				if (!extension.storage.data.analyzer) {
-					extension.storage.data.analyzer = {};
-				}
-
-				if (!extension.storage.data.analyzer[date]) {
-					extension.storage.data.analyzer[date] = {};
-				}
-
-				if (!extension.storage.data.analyzer[date][hours]) {
-					extension.storage.data.analyzer[date][hours] = {};
-				}
-
-				if (!extension.storage.data.analyzer[date][hours][data]) {
-					extension.storage.data.analyzer[date][hours][data] = 0;
-				}
-
-				extension.storage.data.analyzer[date][hours][data]++;
-
-				chrome.storage.local.set({
-					analyzer: extension.storage.data.analyzer
-				});
-			}
-		} else if (message.action === 'blacklist') {
-			var type = message.type,
-				id = message.id,
-				title = message.title;
-
-			if (!extension.storage.data.blacklist || typeof extension.storage.data.blacklist !== 'object') {
-				extension.storage.data.blacklist = {};
-			}
-
-			if (type === 'channel') {
-				if (!extension.storage.data.blacklist.channels) {
-					extension.storage.data.blacklist.channels = {};
-				}
-
-				extension.storage.data.blacklist.channels[id] = {
-					title: title,
-					preview: message.preview
-				};
-			}
-
-			if (type === 'video') {
-				if (!extension.storage.data.blacklist.videos) {
-					extension.storage.data.blacklist.videos = {};
-				}
-
-				extension.storage.data.blacklist.videos[id] = {
-					title: title
-				};
-			}
-
-			chrome.storage.local.set({
-				blacklist: extension.storage.data.blacklist
-			});
-		} else if (message.action === 'watched') {
-			if (!extension.storage.data.watched || typeof extension.storage.data.watched !== 'object') {
-				extension.storage.data.watched = {};
-			}
-
-			if (message.type === 'add') {
-				extension.storage.data.watched[message.id] = {
-					title: message.title
-				};
-			}
-
-			if (message.type === 'remove') {
-				delete extension.storage.data.watched[message.id];
-			}
-
-			chrome.storage.local.set({
-				watched: extension.storage.data.watched
-			});
-		}
-	}
+document.addEventListener("it-message-from-youtube", function () {
+  var provider = document.querySelector("#it-messages-from-youtube");
+
+  if (provider) {
+    var message = provider.textContent;
+
+    document.dispatchEvent(new CustomEvent("it-message-from-youtube--readed"));
+
+    try {
+      message = JSON.parse(message);
+    } catch (error) {
+      console.log(error);
+    }
+
+    //console.log(message);
+
+    if (message.requestOptionsUrl === true) {
+      extension.messages.send({
+        responseOptionsUrl: chrome.runtime.getURL("options-page/index.html"),
+      });
+    } else if (message.onlyOnePlayer === true) {
+      chrome.runtime.sendMessage({
+        name: "only-one-player",
+      });
+    } else if (message.action === "analyzer") {
+      if (extension.storage.data.analyzer_activation === true) {
+        var data = message.name,
+          date = new Date().toDateString(),
+          hours = new Date().getHours() + ":00";
+
+        if (!extension.storage.data.analyzer) {
+          extension.storage.data.analyzer = {};
+        }
+
+        if (!extension.storage.data.analyzer[date]) {
+          extension.storage.data.analyzer[date] = {};
+        }
+
+        if (!extension.storage.data.analyzer[date][hours]) {
+          extension.storage.data.analyzer[date][hours] = {};
+        }
+
+        if (!extension.storage.data.analyzer[date][hours][data]) {
+          extension.storage.data.analyzer[date][hours][data] = 0;
+        }
+
+        extension.storage.data.analyzer[date][hours][data]++;
+
+        chrome.storage.local.set({
+          analyzer: extension.storage.data.analyzer,
+        });
+      }
+    } else if (message.action === "blacklist") {
+      var type = message.type,
+        id = message.id,
+        title = message.title;
+
+      if (
+        !extension.storage.data.blacklist ||
+        typeof extension.storage.data.blacklist !== "object"
+      ) {
+        extension.storage.data.blacklist = {};
+      }
+
+      if (type === "channel") {
+        if (!extension.storage.data.blacklist.channels) {
+          extension.storage.data.blacklist.channels = {};
+        }
+
+        extension.storage.data.blacklist.channels[id] = {
+          title: title,
+          preview: message.preview,
+        };
+      }
+
+      if (type === "video") {
+        if (!extension.storage.data.blacklist.videos) {
+          extension.storage.data.blacklist.videos = {};
+        }
+
+        extension.storage.data.blacklist.videos[id] = {
+          title: title,
+        };
+      }
+
+      chrome.storage.local.set({
+        blacklist: extension.storage.data.blacklist,
+      });
+    } else if (message.action === "watched") {
+      if (
+        !extension.storage.data.watched ||
+        typeof extension.storage.data.watched !== "object"
+      ) {
+        extension.storage.data.watched = {};
+      }
+
+      if (message.type === "add") {
+        extension.storage.data.watched[message.id] = {
+          title: message.title,
+        };
+      }
+
+      if (message.type === "remove") {
+        delete extension.storage.data.watched[message.id];
+      }
+
+      chrome.storage.local.set({
+        watched: extension.storage.data.watched,
+      });
+    }
+  }
 });
 
-document.addEventListener('it-play', function (event) {
-	var videos = document.querySelectorAll('video');
+document.addEventListener("it-play", function (event) {
+  var videos = document.querySelectorAll("video");
 
-	chrome.runtime.sendMessage({
-		action: 'play'
-	});
-});
\ No newline at end of file
+  chrome.runtime.sendMessage({
+    action: "play",
+  });
+});