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I'm using VueJS and Laravel for my project. This issue started to show lately and it shows even in the old git branches.
This error only shows in the Chrome browser.
I disabled all installed extensions in Chrome - works for me.
I have now clear console without errors.
In case you're an extension developer who googled your way here trying to stop causing this error:
The issue isn't CORB (as another answer here states) as blocked CORs manifest as warnings like -
Cross-Origin Read Blocking (CORB) blocked cross-origin response
https://www.example.com/example.html with MIME type text/html. See
https://www.chromestatus.com/feature/5629709824032768 for more
details.
The issue is most likely a mishandled async response to runtime.sendMessage. As MDN says:
To send an asynchronous response, there are two options:
return true from the event listener. This keeps the sendResponse
function valid after the listener returns, so you can call it later.
return a Promise from the event listener, and resolve
when you have the response (or reject it in case of an error).
When you send an async response but fail to use either of these mechanisms, the supplied sendResponse argument to sendMessage goes out of scope and the result is exactly as the error message says: your message port (the message-passing apparatus) is closed before the response was received.
Webextension-polyfill authors have already written about it in June 2018.
So bottom line, if you see your extension causing these errors - inspect closely all your onMessage listeners. Some of them probably need to start returning promises (marking them as async should be enough). [Thanks #vdegenne]
If you go to chrome://extensions/, you can just toggle each extension one at a time and see which one is actually triggering the issue.
Once you toggle the extension off, refresh the page where you are seeing the error and wiggle the mouse around, or click. Mouse actions are the things that are throwing errors.
So I was able to pinpoint which extension was actually causing the issue and disable it.
Post is rather old and not closely related to Chrome extensions development, but let it be here.
I had same problem when responding on message in callback. The solution is to return true in background message listener.
Here is simple example of background.js. It responses to any message from popup.js.
chrome.runtime.onMessage.addListener(function(rq, sender, sendResponse) {
// setTimeout to simulate any callback (even from storage.sync)
setTimeout(function() {
sendResponse({status: true});
}, 1);
// return true; // uncomment this line to fix error
});
Here is popup.js, which sends message on popup. You'll get exceptions until you un-comment "return true" line in background.js file.
document.addEventListener("DOMContentLoaded", () => {
chrome.extension.sendMessage({action: "ping"}, function(resp) {
console.log(JSON.stringify(resp));
});
});
manifest.json, just in case :) Pay attention on alarm permissions section!
{
"name": "TestMessages",
"version": "0.1.0",
"manifest_version": 2,
"browser_action": {
"default_popup": "src/popup.html"
},
"background": {
"scripts": ["src/background.js"],
"persistent": false
},
"permissions": [
"alarms"
]
}
To me i was using a VPN extension called
Free VPN for Chrome - VPN Proxy VeePN It was causing the error after disabling it only ... the error disappeared
This error is generally caused by one of your Chrome extensions.
I recommend installing this One-Click Extension Disabler, I use it with the keyboard shortcut COMMAND (⌘) + SHIFT (⇧) + D — to quickly disable/enable all my extensions.
Once the extensions are disabled this error message should go away.
Peace! ✌️
If error reason is extension use incognito Ctrl+Shift+N. In incognito mode Chrome does not have extensions.
UPD. If you need some extension in incognito mode e.g. ReduxDevTools or any other, in extension settings turn on "Allow in incognito"
Make sure you are using the correct syntax.
We should use the sendMessage() method after listening it.
Here is a simple example of contentScript.js It sendRequest to app.js.
contentScript.js
chrome.extension.sendRequest({
title: 'giveSomeTitle', params: paramsToSend
}, function(result) {
// Do Some action
});
app.js
chrome.extension.onRequest.addListener( function(message, sender,
sendResponse) {
if(message.title === 'giveSomeTitle'){
// Do some action with message.params
sendResponse(true);
}
});
For those coming here to debug this error in Chrome 73, one possibility is because Chrome 73 onwards disallows cross-origin requests in content scripts.
More reading:
https://www.chromestatus.com/feature/5629709824032768
https://www.chromium.org/Home/chromium-security/extension-content-script-fetches
This affects many Chrome extension authors, who now need to scramble to fix the extensions because Chrome thinks "Our data shows that most extensions will not be affected by this change."
(it has nothing to do with your app code)
UPDATE: I fixed the CORs issue but I still see this error. I suspect it is Chrome's fault here.
In my case it was a breakpoint set in my own page source. If I removed or disabled the breakpoint then the error would clear up.
The breakpoint was in a moderately complex chunk of rendering code. Other breakpoints in different parts of the page had no such effect. I was not able to work out a simple test case that always trigger this error.
I suggest you first disable all the extensions then one by one enable them until you find the one that has caused the issue in my case Natural Reader Text to Speech was causing this error so I disabled it. nothing to do with Cross-Origin Read Blocking (CORB) unless the error mention Cross-Origin then further up the tread it is worthwhile trying that approach.
I faced the same error in my react project running.
That error coming from my chrome
IObit Surfing Protection
2.2.7
extensions. That extension off my error was solved.
If you face same like that error, 1st turn off your chrome ad blocker or any other extensions while running.
Late here but in my case it was Kaspersky Cloud Protection Extension. I disabled it. It worked all good.
The cause of this issue is related to one of your chrome extensions, not CORS or CORB. To fix that you can turn off each and every chrome extension you installed.
Norton Safe Web extension for chrome is throwing this error message for me. After I disabled this extension, the error message disappeared.
Just cleaning site cookies worked here.
In my case i had to switch off "Adblock extension" from chrome.
I'm getting a new error in my JS console on Firefox and I haven't changed the code.
I don't get this error in other browsers and doesn't seem to affect the functionality of my code.
It's obviously in some way related to Firefox, but it seems to be pointing the error out to my async loaded facebook JS SDK.
Anybody else using that SDK seeing this in Firefox now? Any help or insight?
This is the full message:
Content Security Policy: Couldn't parse invalid source chrome-extension://lifbcibllhkdhoafpjfnlhfpfgnpldfl
and this is the line in the fb JS SDK:
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I solved this same problem for myself after recently posting it as a Facebook bug on https://developers.facebook.com/x/bugs/729597157070762/ With FB's help I noticed the following unwanted browser extensions in Firefox: Searchme, Slick Savings, Amazon Shopping Assistant, and Ebay Shopping Assistant. Turns out these are essentially malware that effected Firefox, Safari, and Chrome on my Mac. They're made by a company called Spigot, Inc.
While searching for an effective means of virus removal I found this link http://www.thesafemac.com/arg-spigot/ which gives detailed instructions how to do so.
I hope this helps you kevin!
Unfortunately a month or so after my original answer (above) the same error and warnings came back for me but just as of yesterday, 4/22/2014 they changed to these 5 warnings, instead:
Content Security Policy: allow directive is deprecated, use the equivalent
default-src directive instead
...conds();wa=na.getUTCMilliseconds();}na=(pa<=0||pa>=10000?(pa<0?"-":"+")+o(6,pa<0...
all.js (line 27)
The X-Content-Security-Policy and X-Content-Security-Report-Only headers will be deprecated in the future. Please use the Content-Security-Policy and Content-Security-Report-Only headers with CSP spec compliant syntax instead.
"Content Security Policy: allow directive is deprecated, use the equivalent default-src directive instead"
"The X-Content-Security-Policy and X-Content-Security-Report-Only headers will be deprecated in the future. Please use the Content-Security-Policy and Content-Security-Report-Only headers with CSP spec compliant syntax instead."
Use of getPreventDefault() is deprecated. Use defaultPrevented instead.
{href:function(a){return a.getAttribute("href")},type:function(a){return a.getAt
jquery.min.js (line 3)
My guess is that the errors/warnings are due to the way the Facebook like button is engineered and how it interacts with Firefox and other browsers. The change in warnings and errors to these new warnings seems to indicate that Facebook and or Mozilla are working on this issue and will hopefully fix it...???
yesterday, 4/29/2014 This was officially classified as a Facebook known bug issue I created and is currently being addressed. Below is text from the FB email to me:
The bug you are subscribed to "like button works but errors show onload in firebug "Content Security Policy: Failed to parse unrecognized source chrome-extension://lifbcibllhkdhoafpjfnlhfpfgnpldfl"" has been updated:
Status has changed: Closed → Assigned
Hi All, We have managed to reproduce this issue and it appears to be a valid bug. We are assigning this to the appropriate team. This might take some time to fix but we will do our best to keep you updated on the progress of this bug as soon as we can. Thanks
today, 5/07/2014 I just received an email from Facebook stating,
"Status has changed: Assigned → Fixed
This should now be resolved. Thanks for your patience."
Looks good on my end, no longer an issue.
I deleted all FF extensions, and started from clean FF 28 installation.
Installed firebug and user agent overrider add-ons and did not get this error.
Then, I changed user agent and an error shows up on some agents and does not on some.
Error shows up on following agents:
Mac / chrome 32
linux / chrome 32
windows / chrome 32
Android / chrome 32
FYI,
I recently encountered this issue while adding the Facebook javascript login while working in Firefox (28) Private browsing.
I noticed that my Firebug console would consistenly display
"Couldn't parse invalid source chrome-extension://lifbcibllhkdhoafpjfnlhfpfgnpldfl" etc...
It wasn't until I closed my browser completely that this message went away.
This meant that while I was testing my app I would need to completely close out of my browser to refresh the application, not just my private windows but all windows and console log windows as well.
I did not test this in other browsers just Firefox 28.