If you are using the Mega file hosting service to host files and to download them, then you may have come upon a strange error message when you download large files from the service. Large files in this regard are files with a size of at least 50 Megabytes in size.
If you do, you will notice that the file download pauses after downloading for a bit, and that a notification is displayed on the screen that informs you of a problem:
Firefox needs your consent to download large files. Please click ALLOW to continue your transfer.
If you cannot see the request, please click on the icon next to the address bar.
First, there is no allow in the notification which certainly confuses some users as they do not know what to do to correct the issue. A notification is displayed by Firefox that displays the allow button but it sometimes disappears after a short while (likely after user action on the page).
Here is what you need to do to sort this out.
You are probably wondering why this message pops up at all, and why it is not popping up on other websites where you download files that are larger than a certain size. The size is set to 51200 Kilobyte by default
Mega apparently apparently delivers files using indexdb which requires permission if data larger than 50 Megabytes needs to be saved to the system.
You can manage the permissions for each website in Firefox in the following way.
You have two options to clear the offline data. You can open the Firefox profile folder and delete all sites or only a specific site in the indexdb folder of the browser, or use the interface of the browser to clear some or all offline data.
Note: Mozilla has changed the folder the files are stored in from Firefox 26 onwards it seems. You now find the folder under storage/persistent/ in the Firefox root profile folder.
This tip is especially useful for Firefox users who have installed the browser on a Solid State Drive as space is usually scarce. So, if your space is running low this may be one of the locations to check out.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.