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Firefox 52.9.1 ESR

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Firefox 52.9.1 ESR


Firefox 52.9.1 ESR has actually been released here, but apparently, it has not made it into PortableApps yet:

As far as we know, this is the latest single-process-capable Firefox version released, and has many security patches that have been backported.

The latest PortableApp that has been released is 52.9.0 ESR released here:

So, we kindly request that 52.9.1 ESR be released as a PortableApp.

As a side note, if anyone knows if 52.9 ESR (AKA single-process Firefox) is continuing to be developed anywhere (even if not by Mozilla), please let us know.


John T. Haller
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Last seen: 35 min 9 sec ago
Joined: 2005-11-28 22:21
Outdated Apps Thread

You should always report outdated apps here:

For future reference, it's linked from the Development and Support sections as well as a big "Before you post" header when creating a new forum topic.

As to the specific question, we only maintain two ESR releases as per:

The release you are linking to was not officially released by Mozilla, so we don't package it. It's a tinderbox build. You can see official releases here, noting a lack of ESR 52.9.1:

If Mozilla does release it, we will package it.

Sometimes, the impossible can become possible, if you're awesome!

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