Why does my Chrome extension's Action Icon shown on all pages in omnibox?

问题

I have following manifest

  "page_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_title": "Helper for soiduplaan.tallinn.ee"
  },
  "content_scripts": [
    {
      "matches": [
        "http://soiduplaan.tallinn.ee/*"
      ],

But I see icon of my app in all pages I visit:

What do I do wrong? =\

回答1:

Your current code is:

chrome.tabs.onUpdated.addListener(function(a) {
    chrome.pageAction.show(a);
});

This causes the page action to be shown whenever a page is loaded, ie for every tab.
If you want to restrict the page action to certain pages only, check the tab.url property:

chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
    if (tab.url && tab.url.indexOf('http://soiduplaan.tallinn.ee/') === 0) {
        chrome.pageAction.show(tabId);
    }
});

For more info, read the docs for chrome.tabs.onUpdated.

来源：https://stackoverflow.com/questions/16855910/why-does-my-chrome-extensions-action-icon-shown-on-all-pages-in-omnibox