What is Chrome Developer Mode

Basically Developer mode is a way for Chrome Extension’s Developers to Build extension and testing.
But Users also use it as backdoor for unpacked extensions installation. Chrome don’t have any other way to install Extension from outside of Its Official webstore.

How to Install Chrome, Opera Extensions In Developer Mode

1=  Download extension in .zip format
2=  Extract folder from .zip file
3=  open chrome://extensions/ page
4=  Drop folder on chrome://extensions/ page
You are done 🙂

Watch 30sec Video tutorial here

How to Disable Developer Mode Warning

Having Developer mode warning popup every time is very annoying as Hell 🙁

To Disable warning please read Tutorial here

Browser says my extension’s manifest file is missing or unreadable

Something that commonly happens when You select a wrong folder Or you accidentally deleted manifest file. Watch How to install tutorial carefully. Double check the Extension folder where extension’s Source files located. Or download latest version of extension and Install it again

Extensions not working or suddenly stops working

Some users try to install same extensions again and again which is already installed in his/her Browser. Please keep in mind if you install any extension From AddonsCrop and its not working First visit extension page chrome://extensions/ and ensure that extension is Enabled. If its Disabled Then re-Enable it.

Also Please insure you have installed latest version of extension

Watch simple 26 Sec Video Tutorial How to Re-Enable Chrome Extension

If Extension is enabled and its not working Then please Contact us we will fix bugs

How to update extension if new version available


To update Addoncrop’s extension to new version follow these easy step

  • Open chrome://extensions/
  • Remove old version extension from browser. Also delete Extension’s folder if you want
  • Download latest version of extension from Addoncrop
  • Unpack extension folder from .zip
  • Install latest version using Developer Mode installation Method

How To Delete or Uninstall AddonCrop’s Extension

Typically when I’ve uninstalled a Google Chrome, opera Extension I’ve done it by typing chrome://extensions in the address bar. Alternatively, you can use the browser’s Customize and Control settings page. The process is easy as you would expect if the extension shows.

  1. Click the menu icon on the Browser toolbar and then More tools.
  2. Select More tools from the menu.
  3. Select Extensions from the side menu
  4. Click the trash can icon link next to the extension you wish to remove.

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38 Comments on "Troubleshooting Google Chrome Extensions"

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pro user
Hi, Thanks for these amazing useful extensions. i know google isnt happy with your works, BUT it dosnt CAREE !! because the USERS are so much HAPPY with that ! )) google owners are such a Selfish+Brainless creatures WHOSE wonts to making works easier for users. Suggestions : 1- making chrome full backup { or at least Extensions+settings } on Local computers. google Sync was a useless+Sh!t for me, it recovered just only some incomplete Bookmarks for me ! )) im using “GoodSync” application for now, but im not sure to chrome will be working to good by replacing user… Read more »
Douglas Henrique

I think the Vevo problem is back. My extension was working fine and a few days ago it startet to fail to download the video (the “videoplayback.txt” problem). An exemple:

ibnou faye

very nice. Helpful


Privacy is a problem though….as my PC is used by multiple users.
Password protection can me added!!

Stevenson Exantus

Exactly what I needed



jennifer joseph



Great program. Works as designed.


Much more appreciated.


I was trying to install the video downloader in chrome in “developer mode” and I received an error message that the manifest file was unreadable. Please help.

Rod Sims

if you get the warning on secure sites (https) and it crosses the https url out, just ignore it, it means nothing, As long as when you start Chrome, you just cancel the warning message about “insecure scripts”, that is caused by the video downloader in developer mode. It’s better than not having the superb extension at all, so just ignore it. everything works fine, just ignore the messages and enjoy the extension.




nice axtensiom


I solved it. There were two folders with same name. So I went back in and selected the other one. It’s working now! Woohoo!


i had problem but i saw the extensions it waas disabled now its working i click enable


Drag and dropped ext from this site with developer moded checked…looked good then after a few minutes chrome? flashed a box saying not approved. Tried checking unchecking dev box, no change, it would not let me check the use box for the ext. Used to work great so I think google is making their own fix to prevent its uses. Any thoughts…did a reinstall etc, repeatable events. Thanks

Tariqul Islam Jewel

u r to good

William Solberg

Where can i select the save location of the files im downloading?

Browser Name
Hi, I’m trying to disable “developer mode warning” but when i run the bat file, it errors. The error: The term ‘C:UsersAZ40EB~1.SAppDataLocalTempDevWarningPatch.ps1’ is not re cognized as the name of a cmdlet, function, script file, or operable program. C heck the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:59 + C:UsersAZ40EB~1.SAppDataLocalTempDevWarningPatch.ps1 <<<< 'C:UsersA. Z.SDesktop ' '' + CategoryInfo : ObjectNotFound: (C:UsersAZ40EB…arningPatch.p s1:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundException I copied the red error part. My username is A.Z.S
Browser Name

super extension seul problème il faut faire annuler à chaque démarrage de chrome c’est énervant ! super extension. only problem, you have to cancel every time you start Chrome is annoying!


Pour ça qu’il faut lancer le batch file pour l’enlever de la DLL après chaque mise à jour, regarde sur le site en haut dans l’onglet “Disable Developer Mode Warning” ( http://addoncrop.com/disable_chrome_developer_mode_popup/ )