How to Turn On / OFF legacy Extensions in Firefox 57

 
Firefox Nightly 57 now introduces its users a new option that allows you to Turn On / OFF legacy Extensions. The extension that works according to the techniques prescribed in a document is termed as legacy technology in the browser. Firefox Nightly is the first variant of the version 57 of this web browser. As a current user of this edition, you might have experienced that it disables all legacy extensions.

 

This means that an add-on not using WebExtensions API will not be available for Firefox. Even It exists in Mozilla add-ons repository and installed in the web browser you could not find anymore. It is noteworthy the disabling was pre announced by Mozilla. Since Firefox is a user-friendly browser, it has the provision to bypass the restriction that blocks the usage of legacy extensions. See the steps below –

How to Turn On OFF legacy Extensions in Firefox 57

Turn On / OFF legacy Extensions in Firefox 57

Just like the previous version you can control it through the configuration page.

Step 1 – Open Mozilla Firefox and type or copy and paste the given data.

about:config

How to Turn On OFF legacy Extensions in Firefox 57 pic 1Step 2 – Then the browser displays a warning message because you are about to meddle with the configuration of the browser. But proceed further by hitting the button I accept the risk!.How to Turn On OFF legacy Extensions in Firefox 57 pic 2Step 3 – On the new appearing page type or copy and paste the under given.

extensions.legacy.enabled

How to Turn On OFF legacy Extensions in Firefox 57 pic 3

Step 4 – This will list the preferred option with respect to Legacy Extensions.

Turn On legacy Extensions in Firefox 57

Step 5 – In order to turn on Legacy Extensions double click on extensions.legacy.enabled and reset the value to True.

How to Turn On OFF legacy Extensions in Firefox 57 pic 4

Turn Off Legacy Extensions

Step 6 – Simply double click the value of extensions.legacy.enabled preference and set it to False in case you want to turn off Legacy Extensions.

How to Turn On OFF legacy Extensions in Firefox 57 pic 5

See another article for this browser – How to Turn On / Off Screenshot Tool in Firefox.

Final note

The new version Nightly does not feature the legacy extensions directly on the browser. Hence your add-ons go meaningless after updating the browser to the version 57. But you can adjust the legacy with the help of these steps. Therefore try these steps to Turn On / OFF legacy Extensions in Firefox 57 as and when there is a need.

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    One thought on “How to Turn On / OFF legacy Extensions in Firefox 57

    1. It’s a time to unistall Mozilla!!

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