Before you do anything, you need to know the Extension ID of the extension you want to download.
Update: As some users have pointed out, going into Incognito Mode with Ctrl-Shift-N, loading the page of the extension in that mode and clicking on install then should also fix the issue. If you’ve already installed the extension that you want to download, you can just repack the extension into a CRX file.
now click on the new command the right-click menu of google chrome will immediately open internet download manager & it,s start the download processes. if you want to install Download files with IDM Extention from the right-click menu just u have dropped the download crx file in chromed. I can't say what is causing this but if you run into the error, I suggest you check if you are signed in and if you are not, sign in to see if it fixes the issue on your end. Download files with IDM Extention from the right-click menu. I then signed in on the second Chrome browser and here too, the installation went through without issues. Signing out in the other browser and signing in again on the other hand let me download and install the extension just fine a second time.
I tried it again in the second version of Chrome that I was not signed in and it failed again. Guess what, after signing in the installation went through without issues. Last thing I tried, and that is one of the things that still puzzles me, is to sign in to a Google account. I tried a lot of things afterwards, clearing the cache, trying to find the download url of the crx file manually and all of that stuff. For one, they had a slightly different file size which is obviously a bad sign if it is the same file download. The download directory was listing the crx file downloads, but attempts to install the extensions in Chrome revealed that they appeared to be corrupt. Turned out, I received the same error messages when trying to install extensions in the browser too. I fired up Chrome Canary, another version of Chrome that I use rarely to see if I was able to install extension in the browser. Need to know if anything similar is available for Chromium based Edge. Somehow Chrome was not download an extension file, which do have the crx file extension, but something else. The crx of extension hosted in chrome extension can be downloaded from the domain ''. On the other hand, if the system already.
Now, drag the Chrome Extension File (CRX) to the Chrome window. I did receive the same error message which puzzled me. If your computer does not recognize the CRX file format as an extension of Chrome, then open Chrome browser, click the Settings button, choose the option Tools and select Extensions. Reloading did not fix the issue, neither did a restart of the browser, and next thing I tried was to install another extension from the official web store to see if it did install in Chrome. The message below that stated that the download was not a CRX. When I tried to install a Google Chrome extension in the latest dev version of the web browser I was notified that an error had occured.