I need more information to help you. You can submit an issue on https://github.com/jscher2000/Content-Type-Fixer-extension/issues or send an email to jscher2000@outlook.com .

Otherwise: Please check my general help page at https://www.jeffersonscher.com/ext/content-type-fixer.html and if you use automatic private browsing ("Never Remember History") make sure to enable the extension for private windows as described in https://support.mozilla.org/kb/extensions-private-browsing .

Thank you for your comments.

To turn off the fix for .acsm or any other extension, click "Enable/Disable Content Types". To adjust opening automatically vs. saving, try the steps in https://support.mozilla.org/kb/change-firefox-behavior-when-open-file

When you have a content type set to "Use [relevant application]" on the Settings page, Firefox 98+ uses the "Save files to" folder to save the file and pass it over to [relevant application]. Firefox 102 for Windows/Linux will have a preference in about:config to allow using the system Temp folder instead, similar to Firefox 97 and before (browser.download.start_downloads_in_tmp_dir).

Hi Brett, when I searched for MediaFire, I found a content hosting site. It's possible that users embedded content from their MediaFire gallery into a page, and that the extension broke the embed by modifying one of the two headers (turning it into a download instead). In case this is about to affect a lot of uses, could you email me with more information about where you saw this problem? jscher2000@outlook.com Thanks.

If you would like assistance with the extension, reach out to me using one of the links on the main page in the More information section (Support site or Support Email).

To address a few limitations of the extension:

(1) Firefox detects certain files as executable and will not let you override the Save/Cancel dialog and open them automatically, even if you try to disguise the file as a different type.

(2) By default, the extension does not run in private windows. Check this article for steps to allow that: https://support.mozilla.org/kb/extensions-private-browsing

(3) If you select "Follow my settings (inline)" to override forced downloading, it doesn't apply to certain Google sites (because it causes a different error).

(4) The extension does not "see" files that are generated within a page using a script (blob's) or files opened from disk, only ones retrieved from the network.