We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Temporary Extensions Access to the file was denied

feihuit
feihuit
more options

Temporary Extensions not work he file at moz-extension://ceb13d04-2561-4ec3-9c55-24fa6adf39b7/manifest.json is not readable. It may have been removed, moved, or file permissions may be preventing access.

Loading failed for the <script> with source “moz-extension://08d5f524-4730-47a6-86f7-ce36ed98acb1/background.js”.

on windows first i installed firefox  : release 68 and then i tried developer edition 70.0b1, same problem , search and lookup many documents and threads for many hours , nothing get help.

finally i tried move the file from a: to c: , it works!!!

but i still not clearly know what caused the problem. the driver a: is a ramdisk. windows work on it well. is FF not recognize driver a: or not for ramdisk? the resource about this not so much, i wrote here also hope to save times for somebody with same problem

Temporary Extensions not work he file at moz-extension://ceb13d04-2561-4ec3-9c55-24fa6adf39b7/manifest.json is not readable. It may have been removed, moved, or file permissions may be preventing access. Loading failed for the <script> with source “moz-extension://08d5f524-4730-47a6-86f7-ce36ed98acb1/background.js”. on windows first i installed firefox : release 68 and then i tried developer edition 70.0b1, same problem , search and lookup many documents and threads for many hours , nothing get help. finally i tried move the file from a: to c: , it works!!! but i still not clearly know what caused the problem. the driver a: is a ramdisk. windows work on it well. is FF not recognize driver a: or not for ramdisk? the resource about this not so much, i wrote here also hope to save times for somebody with same problem

All Replies (1)

Wesley Branton
Wesley Branton
more options

Although it's generally considered poor practice to use the drive letters A or B for anything other than floppy drives, although most operating systems don't prohibit you from doing that. Some software may have issues if you do that, but Firefox is not one of those programs.

I tested using a USB drive with the letter A and it worked no problem when I loaded a temporary add-on on it. My guess is that Firefox doesn't have access to read the files on the drive that you are using.

You may need to adjust your file permissions for that folder in order for Firefox to be able to access the data.

Hope this helps.