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How to fix “mutation operation” errors in Firefox

You may find at some point using firefox you are unable to access some websites which rely on complex javascript libraries. When you look at the errors on the page, you see:

A mutation operation was attempted on a database that did not allow mutations

The solution is to make sure dom.indexedDB.enabled is set to true in about:config

One example of a website with this problem is which will not display anything on the page unless this setting is enabled. Developers should wrap such function calls in try/catch or other error handling so your entire website doesn’t fail. Browser sniffing is not adequate.

3 responses

  1. i have this error and this solution did not fix the problem .

    November 17, 2019 at 1:19 pm

  2. FrankHog

    бетононасос модели техника из Европы

    December 28, 2019 at 4:21 am

  3. francis

    dom.indexedDB.storageOption.enabled at true works

    October 31, 2021 at 10:29 am

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