So, here's is my doubt.
I'm using the MediaRecorder API, to make a recording of my browser's screen. I can capture the whole browser screen + audio(tab) + my microphone. Everything is working fine. But I only need to capture the screen+audio from the tab that started the recording. On that popup thats opens on google chrome, when I want to screenshare some tab or application, is it possible to show only the tab that started the screenshare? So I don't have to seek everytime the tab that I want to share.
I didn't find any information about that.
When working with the google chrome API, I see that we can capture only a tab, but outside this API, is it possible to accomplish something similar? Or is only possible to work with pre-selected tab if I develop a google chrome extension?
chrome.tabCapture.capture({audio: true, video: true}, callback);
Unfortunately you can't specify it or limit it to the current tab.
Note: Constraints never cause changes to the list of sources available
for capture by the Screen Sharing API. This ensures that web
applications can’t force the user to share specific content by
restricting the source list until only one item is left
https://developer.mozilla.org/en-US/docs/Web/API/Screen_Capture_API/Using_Screen_Capture
Chrome DevTools has a handy inspector for Local Storage and Session Storage, but is there nothing to inspect chrome.storage.sync?
chrome://sync-internals/ doesn't seem to display the actual contents of the synchronized storage per extension.
Storage Area Explorer extension provides a UI for viewing, editing, clearing, importing and exporting of chrome.storage.local, chrome.storage.sync, localStorage and sessionStorage.
In the future this feature may be implemented natively: https://crbug.com/848752.
Warning for ManifestV3: since devtools for service worker doesn't show storage, you'll have to open any visible page of your extension like the popup or options, right-click the page, then click "inspect", then go to Storage Explorer. If your extension doesn't have any visible pages, you can open chrome-extension://ID/manifest.json where ID is the id of the extension as shown in chrome://extensions page. Another method is to right-click any script from your extension in devtools (when you inspect the content script or service worker), then click "Open in a new tab". You can add a bookmark for this tab to open it quickly next time.
Visit chrome://sync-internals/
Click Sync Node Browser tab and wait for it to load (may give a blank screen or in progress cursor)
Click expansion triangle in the sidebar for Extension settings
Click on individual settings in the sidebar to see their values and other metadata
A poor workaround is to call get and obtain all the stored values. Of course, this doesn't let you conveniently edit them:
chrome.storage.sync.get(null, function callback(items) { console.log(items) });
In Google Chrome, I can type the following in a new browser:
pycharm://open?file=file_name
and press Enter. The result is that PyCharm IDE will launch and open the specified file. I have also come across similar links that launch other applications.
I tried to look for information about such links but did not reach any conclusions. Specifically, I would like to know:
what is the name of such a link?
who defines those links? Since I cannot find any documentation about those links on PyCharm's side, I am led to think that those links are some form of standard command that work for every external application?
how do those links work under the hood? Is it the browser spawning a new subprocess or does the browser somehow communicate the command to the OS which takes it from there?
I can also do the above programmatically:
window.open('pycharm://open?file=file_name', '_top');
How can I ensure that the focus switches to the target application? (Right now the application does indeed start, but the focus stays on Chrome.)
I am currently analysing my page connections and I want to block some tracking scripts and other external URL calls in my network monitor inside Chrome's developer tools.
I quickly want to check how the page behaves without some libraries.
Chrome itself does not provide any functions like this and the famous blocking extensions only block URLs which the user enters manually into the navigation bar.
As pointed out by #calavera.info, #iman.Bahrampour, and #Asim K T this feature is now available in Chrome 59. You can select a URL or domain to block in the Network panel. See this release note and these Screenshots where the StackOverflow logo has been blocked from this page. #iman.Bahrampour also shares two extensions below that will also do this ("HTTP Request Blocker" and "Request Blocker").
As abd3721 mentioned this is available directly within chrome DevTools (You don't need to be on canary anymore), however it is still behind a flag and in the hidden experimental features menu. As of the time of this comment, Chrome stable is on version 53.
To enable it, open this link and click the enable link under the appropriate flag:
chrome://flags/#enable-devtools-experiments
Then in DevTools open up the settings panel(F1) and click on the experiments tab.
This lists all currently available DevTools experiments but it is still in yet another hidden set of features.
Press Shift 6 times while in the experiments tab to show even more hidden features, one of them will be Request Blocking.
NOTE: These features are considered experimental and may be buggy or incomplete. Use with caution.
For blocking requests in google chrome you have 3 options:
1. Google Chrome with pattern matching:
In network tab, right click on request and then select block request URL
There is a plus sign that adds patterns for blocking requests
For example I have 7 request URLs:
http://www.test.com?userid=5
http://www.test.com?username=username
http://www.test.com?email=email
http://www.test.com?name=x
http://www.test.com?family=q
http://www.test.com?family=y
http://www.test.com?family=z
I can block requests that have a specific pattern by adding a pattern(for example the pattern *family* blocks 3 below requests):
http://www.test.com?family=q
http://www.test.com?family=y
http://www.test.com?family=z
Be careful! Because patterns are case sensitive
2. HTTP Request Blocker extension:
This extension has pattern matching for blocking requests:
Match patterns
3. Request blocker extension:
This is a useful extension that has pattern matching for blocking requests.
The most useful features of this request blocker are importing and exporting lists for using by other People.
For exporting a list and using in another computer(or future used): click on Direction down and select Export.
Open the exported list with import list button.
Good Luck
From Chrome 59 you can block specific requests from Network tab of developer tools itself.
https://developers.google.com/web/updates/2017/04/devtools-release-notes#block-requests
Right-click on the request in the Network panel and select Block Request URL. A new Request blocking tab pops up in the Drawer, which lets you manage blocked requests.
This is now achievable in Chrome 59 developer tools by blocking respective requests: https://developers.google.com/web/updates/2017/04/devtools-release-notes#block-requests. With this approach it is somehow difficult to turn off all the stylesheets, but it's easier to turn off just the most annoying ones.
As for Google Chrome 94, it's possible to exclude network activity for entire domain:
1. Go to "Network" panel of DevTools:
2. Rigth click on item of domain you want to block, click on "Block request domain" in the context menu:
3. Type "status-code:0" into "Filter" and click on "Invert" checkbox:
To manage blocked domains, press ESC button when in DevTools, and click on "Network request blocking" tab in the bottom panel:
Will changing host file help.
Your system (windows, linux, mac) all check host before requesting DNS lookup. I use it when I wan tot block some slow advertisers.
windows:
c:\Windows\system32\drivers\etc\hosts
linux & mac
/etc/hosts
* BE VERY CAREFUL TO MAKE BACK UPS *
An existing bug report is requesting this feature. You can star that issue to show support for it being added.
Well, i have been looking for an answer for this too, as I had this issue of choices by counterfeit, and nothing seemed to work for me.
But then I tried to analyze the requests and other things until I figured out, that there was this site which was loading ads onto my pages and redirecting me to advertisements. And also changing the google search bar on new tabs to some unknown search engine. I was able to temporarily block the request on one page. but after opening a new tab, the ads would appear again.
So googling for request blocker, I came up with a chrome extension "HTTP Request Blocker" and added the address which was causing all the crazy ads, has now solved the problem fully.
I hope it will be of help to you too or anyone else.
In the original question, the author states:
the famous blocking extensions only block URLs which the user enters manually into the navigation bar.
This is no longer the case. I have really enjoyed using mokku, which can intercept and mock all types of requests. You can specify what the status code should be, so it will definitely solve this problem as well as adding other functionality that is helpful. It works by another tab in the chrome dev tools. Here is a link to the extension: https://chrome.google.com/webstore/detail/mokku-mock-api-calls-seam/llflfcikklhgamfmnjkgpdadpmdplmji?hl=en
I'm looking to build a chrome extension that allows the user to have an independent subwindow that is the same in each tab (for example you are taking notes and the notes are synchronized among each tab). Also, clicking a link should not destroy this subwindow.
One solution is to inject an iframe in each tab, and try to synchronize this data serverside and send back to each client tab, as it is updated.
This seems very tedious, plus the iframe would be provided by a third party, and I want to make it the easiest for them.
Is there a way I can have a shared dom piece and display it in its current state across several tabs?
There's an API (still experimental as of Chrome 17) that does more or less exactly what you want. If you visit about:flags, and enable "Panels" (they're enabled by default in Dev and on Canary (and on ChromeOS)), you'll be able to use chrome.windows.create with a type of panel to create a floating pane that exists independently from the browser window. That would likely meet your need.
Take a look at the Google Talk extension for an example of how it might work.