Firefox Add-on Compatibility Reporter, Force Add-On Compatibility

Martin Brinkmann
Apr 1, 2011
Updated • Nov 20, 2012
Firefox, Firefox add-ons

Coincidence? Ghacks reader Paulus reported troubles with his version of Firefox, which basically showed a loading add-on manager screen whenever it was started, with no options to close that screen other than to shut down the whole browser. I suggested starting Firefox in Safe Mode and he discovered that the Firefox add-on Add-on Compatibility Reporter appeared to be the culprit.

Roman, another Ghacks reader send me an email yesterday where he recommended the same add-on. With all the buzz surrounding the add-on I thought I would give it a try.

Add-on Compatibility Reporter is an official Mozilla add-on that has been designed to test and report add-on compatibilities. The extension enables all add-ons that are not compatible with the version of Firefox used on the computer. It basically overrides the extension compatibility checks and enables all add-ons regardless whether they are working.

Intended for alpha and beta users to test and report add-on compatibilities, it has since then been used by regular Firefox users as well to force add-on compatibility.

add-on compatibility reporter

All add-ons are automatically activated, and users who just want to use the add-on for that do not need to make other changes to the system. Users who want to help Mozilla can report add-on compatibilities in the Firefox add-on manager.

A new compatibility drop down is added to each add-on listing. This dropdown can be used to report incompatible and compatible add-ons. Already compatible add-ons can be reported as incompatible, and incompatible add-ons as compatible.

The following window opens up if you want to report an add-on as incompatible.

report incompatible addon

You can add a description of the problems encountered and the list of installed add-ons to help Mozilla identify possible conflicts. It is furthermore possible to disable the add-on in the dialog.

Users who encounter problems after activating the Add-on Compatibility Reporter need to uninstall the extension to revert the changes. It will disable all incompatible add-ons. This is probably what has fixed the issue for Paulus. While the problem may have been caused by the compatibility reporter itself, it is more likely that it has been caused by an incompatible add-on instead. Removing the compatibility reporter would have deactivated that add-on in Firefox so that the issue would no longer occur.

Regardless: Users who just want to make their add-ons compatible with the latest version of Firefox should head over to Three Methods To Force Add-On Compatibility In Firefox to do just that.

Firefox users who want to help Mozilla on the other hand can use the the Add-on Compatibility Reporter to do just that. The Firefox extension is compatible with all versions of Firefox from 3.5 to the latest alpha releases of 4.2.


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  1. Robert Palmar said on April 1, 2011 at 6:05 pm

    Nightly Tester Tools was updated March 22, 2011 and works for me.
    The button was removed from the AddOn window and now
    “Force AddOn Compatibility” is in the Tools menu.

  2. SFdude said on April 1, 2011 at 5:29 pm


    thanks for the timely post.

    I use the “Compatibility Reporter” FF ext,
    without ANY problems at all.

    It really helps me with older,
    but still very useful incompatible FF extensions.

    In the past, I used another FF ext:
    “Nightly Tester Tools”,
    to force compatibility of older FF extensions.

    But, “NTT” is no longer supported,
    and its author suggests using
    the new “Compatibility Reporter” FF ext.,
    (see the his note in the Mozilla extension page for NTT !).

    FF 3.6.16 || XP-SP3

  3. Roman ShaRP said on April 1, 2011 at 5:21 pm

    So far this add-on didn’t raised any issues for me and my new Palemoon (custom optimized Firefox build) 4.0 setup. I’m glad to have my 37 add-ons working, gg :)

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