Hi Mike

No errors on the console and the value was not a string.

*Tiago Marques Delboni*

Em 23/08/2019 13:31, Mike Kaply escreveu:

I just tried changing my value to 22 and things still worked.

Can you check and see if there was an error on the console?

Mike Kaply

On Fri, Aug 23, 2019 at 11:29 AM Mike Kaply <mka...@mozilla.com <mailto:mka...@mozilla.com>> wrote:

    That is an internal preference that shouldn't be messed with (it
    should get set automatically)

    The current version is actually 87 (It is not tied to the browser
    version).

    And an old version should work fine (unless it was a string for
    some reason)?

    Mike

    On Fri, Aug 23, 2019 at 11:24 AM Tiago Marques Delboni
    <tiago.delb...@almg.gov.br <mailto:tiago.delb...@almg.gov.br>> wrote:

        Hi all!

        After upgrading from ESR 52.9 to ESR 60.8, some users reported
        that only the first tab opened in Firefox was working. They
        can open new tabs but cannot navigate on them.

        I've found that the problem was with the property
        "browser.migration.version" set in
        "%appdata%\Mozilla\Firefox\Profiles\{userprofile}\prefs.js":

        user_pref("browser.migration.version", 22);

        Removing this line or setting the value to 66 fix the issue.
        So, how exactly does this property works? I couldn't find any
        information about this.

--
        *Tiago Marques Delboni*
        Gerência de Aplicações e Suporte a Clientes / GTI
        (31) 2108-7700

        Assembleia Legislativa de Minas Gerais
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