Corrupt Download Catcher (CDC)

Corrupt Download Catcher (CDC)

Warns you if a file you just downloaded is under 4 KB or if the server returned an error during the download, which could mean you just downloaded an error page instead.

Corrupt Download Catcher (CDC) promo image
What is Corrupt Download Catcher (CDC)?

Corrupt Download Catcher (CDC) is a Firefox add-on that alerts you if a downloaded file is under 4 KB or if the server returned an error during the download. It helps prevent downloading error pages instead of the intended files.

Stats date:
By: em_te
Users: 9
Version: 0.1.1 (Last updated: 2020-03-26)
Creation date: 2019-01-28
Weekly download count: NaN
Firefox on Android: No
Manifest version: 2
  • <all_urls>
  • notifications
  • downloads
  • webRequest
Size: 18.73K
Risk impact: High risk impact
Risk likelihood: Low risk likelihood

Other platforms

Not available on Chrome
Not available on Edge

Why: Currently when you download a file the browser will prompt you where to save it and will proceed as such. However, if the file doesn't exist on the server and the server returns an HTTP 404 error, the browser won't tell you and will just download that error page and save it as the file you wanted.

Only afterwards when you try to open the file will you realize it is not what you wanted.

How: This add-on will perform 2 checks to make sure the file is the one you wanted.

Firstly, if the downloaded file is less than 4 KB it will show a notification telling you so. A file less than 4 KB should rarely happen.

Secondly, if the file download request was responded to with a 4XX or a 5XX error, it will also show a notification telling you so.

Clicking on the toast notification will open the folder containing the downloaded file.

Permissions Disclosure:

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Risk impact

Corrupt Download Catcher (CDC) is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Corrupt Download Catcher (CDC) if you trust the publisher.

Risk likelihood

Corrupt Download Catcher (CDC) has earned a fairly good reputation and likely can be trusted.

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