I just updated FireFox to the latest version and IDM integration with FireFox has stopped working. IDM no longer accepts downloads from FireFox. What can I do to fix this?
FireFox said it was disabling IDM expansion because it was not compatible. How can I solve the problem
I cannot integrate IDM with FireFox 73 FireFox 72 FireFox 71 (FireFox 70, 69, 68, 67, 66, 65, …, 11, 10, 9, 8). what do I have to do
The Mozilla team updates the FireFox browser every six weeks, so our team updates IDM’s integration with FireFox every six weeks. The latest version of IDM detects the version of the FireFox browser and automatically installs the required additional version.

Please use the IDM main menu item “Help → Check for Updates …” (or “Help → Quick Updates” for older versions). Then restart your computer. IDM must replace all DLLs for the changes to take effect. Will not work without restarting the update!
- Starting with FireFox 8, Mozilla displays a confirmation dialog for installing applications. After initially installing IDM or updating IDM to the latest plug-in, IDM will prompt you to restart FireFox so that FireFox can find the new IDM plug-in. When FireFox restarts, it displays the following dialog to confirm the installation of the IDM plugin. You must activate the “Allow this installation” box:

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You may not have noticed this dialog and did not enable the IDM integration plugin when restarting FireFox. In this case, you must activate it manually. Please use the “Tools → Plugins” FireFox main menu item.

The Plugins Manager window should open. Click on the “Extensions” tab (arrow 1 in the picture) and find
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“IDM integration” (Internet Download Manager integration plugin for Mozilla). If it is turned off, you need to hit the “Enable” button (arrow 2 in the picture) and restart FireFox.

New and old versions of IDM extensions
3.1. Note that due to global changes in FireFox 40, we had to develop a new addon for FireFox with a new identity. The old version of the plugin was called IDM CC, and the new version was called IDM Integration.
Note that due to global changes in FireFox 53, we had to develop a new “IDM Integration Module” plugin for FireFox.
Currently, the oldest plugin is IDM CC, and it supports FireFox from version 1.5 to version 26.
The next plugin is “IDM integration”, which supports FireFox browsers from 27 to 52.
The latest addition is the “IDM Integration Module”. It supports FireFox browsers starting with version 53.
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Note that all three versions of applications are included in the IDM distribution, and you will most likely see two or three IDM applications in the FireFox settings in the list of applications: old and new.

3.2. If you have installed the old IDM CC plugin manually, you must click the “Delete” button next to it:

3.3. If your application is not in FireFox, you can install it manually. Open the FireFox menu and click the “Extras” button, see the actions (1) and (2) in the figure below.

Click the “Tools for all plugins” wheel (3) and select the “Install plugin from file …” (4) menu item from the menu.

Then, open the IDM folder where you installed the IDM (by default, “C: \ Program Files (x86) \ Internet Download Manager \”).

You have 3 XPI files here. They have the same name, but a different number at the end. Please look carefully at the following:
- Select idmmzcc3.xpi for FireFox 53 and newer versions.
- Select idmmzcc2.xpi for FireFox browsers from version 27 to version 52 inclusively.
- Select idmmzcc.xpi (without a number) for FireFox versions from 1.5 to 26.
If you have selected the correct version, FireFox will display a dialog confirming the installation. Click “Install”:

If you have selected the wrong XPI file version, FireFox displays an error message.
How do I know the version of my FireFox browser?
Open the FireFox help menu

Select the “About FireFox” menu item

Then you can see the version of your FireFox browser.
