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Norton (Mac) - Message: "Norton Extension could not be installed because it is not compatible with Firefox 57 or Nightly Firefox 58 version"

Older versions of Norton extension for Firefox do not work after you upgrade it to Firefox 57 on Mac OS 10.9.x. To fix this problem, manually remove the older version of Norton extension, and install the latest version.


For Norton Internet Security 5.10.x and Norton Security 6.x, only Norton legacy extensions are available that are not compatible with Firefox 57 or later.

STEP 1

Manually remove Norton extension

  1. Start Firefox.

  2. On the top-right corner, click the Open menu icon, and click Add-ons.

    Firefox select menu icon

  3. On the Legacy Extensions tab, next to Norton Security, click Remove.

    Firefox Legacy extentions: remove

STEP 2

Install Norton extension

  1. Start Firefox.

  2. Visit the Norton Identity Safe page to automatically download and install the Norton extension.

  3. To make sure that the add-on is installed, click the Open menu icon, and click Add-ons.

    Firefox menu icon

  4. On the Extensions tab, make sure that the Norton extension is installed and enabled.

If you have any questions, come by the Help Desk at Hardman & Jacobs Undergraduate Learning Center Room 105, call 646-1840, or email us at help@nmsu.edu.



Keywords:Norton Mac Message Norton Extension could not be installed because it is not compatible with Firefox 57 or Nightly Firefox 58 version anti virus internet security browser web   Doc ID:80365
Owner:John B.Group:New Mexico State University
Created:2018-02-22 09:49 MDTUpdated:2018-06-06 13:22 MDT
Sites:New Mexico State University
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