What to do if Firefox tries to open a title you're downloading with the wrong program

If you're having trouble opening downloaded ebooks through Firefox, you'll need to make sure Adobe Digital Editions is the default program for opening ACSM files (which are the download files for ebooks).

If you're having trouble opening downloaded audiobooks through Firefox, you'll need to make sure OverDrive for Windows (desktop) is the default program for opening ODM files (which are the download files for audiobooks).

Note: As of February 23, 2022, OverDrive for Windows (desktop) is no longer available to install. If you don't have OverDrive for Windows (desktop), you can listen to audiobooks using Libby (for libraries), Sora (for schools), or your library's OverDrive website instead.

Use the steps below to make Firefox open the download files (ACSM or ODM) with the correct program (Adobe Digital Editions or OverDrive for Windows).

Windows steps for ebooks

1. Open Firefox and click the Menu button in the upper-right corner, then click Settings.
2. Scroll down to "Applications" (in the "General" panel).
3. Type "Adobe content" (or "ACSM") into the search box and select Adobe Content Server Message (or acsm file).
   
4. Click the drop-down in the "Action" column, and select Use Adobe Digital Editions.
   
   If Adobe Digital Editions isn't listed, click Use other... and continue to the next step; otherwise, skip to step 8.
   
5. In the "Select Helper Application" window, double-click Adobe Digital Editions.
   If Adobe Digital Editions isn't listed, click Browse... and continue to the next step; otherwise, skip to step 8.
6. Browse to the "Adobe" folder inside your "Program Files" or "Program Files (86x)" folder (depending on your system type).
7. Open the "Adobe Digital Editions [version number]" folder and double-click digitaleditions.exe.
   
8. Try downloading the ebook again from your library's website.
9. If Adobe Digital Editions is selected in Firefox and you're still having trouble downloading your ebook, try the steps in this help article.

Windows steps for audiobooks

1. Open Firefox and click the Menu button in the upper-right corner, then click Settings.
2. Scroll down to "Applications" (in the "General" panel).
3. Type "OverDrive" (or "ODM") into the search box and select OverDrive Media File (or odm file).
4. Click the drop-down in the "Action" column and select Use OverDrive for Windows.
   If OverDrive for Windows isn't listed, click Use other... and continue to the next step; otherwise, skip to step 8.
   
5. In the "Select Helper Application" window, double-click OverDrive for Windows.
   If OverDrive for Windows isn't listed, click Browse... and continue to the next step; otherwise, skip to step 8.
6. Browse to the "OverDrive for Windows" folder inside your "Program Files" or "Program Files (86x)" folder (depending on your system type).
7. From the "OverDrive for Windows" folder, double-click MediaConsole.exe.
   
8. Try downloading the audiobook again from your library's website.
9. If OverDrive for Windows is selected in Firefox and you're still having trouble downloading your audiobook, try the steps in this help article.

Mac steps for ebooks

1. Open Firefox and click the Firefox drop-down menu in the upper-left corner, then click Settings.
2. Scroll down to "Applications" (in the "General" panel).
3. Type "Adobe content" (or "ACSM") into the search box, and select Adobe Content Server Message (or acsm file).
   
4. Click the drop-down in the "Action" column and choose Use Adobe Digital Editions.
   If Adobe Digital Editions isn't listed, select Use other from the "Action" drop-down. Then, go to Applications > Adobe Digital Editions [version number] and click Open.
5. Try downloading the ebook again from your library's website.
   
6. If Adobe Digital Editions is selected in Firefox and you're still having trouble downloading your ebook, try the steps in this help article.