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    Hi all!<br>
    <br>
    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.<br>
    <br>
    I've found that the problem was with the property
    "browser.migration.version" set in
    "%appdata%\Mozilla\Firefox\Profiles\{userprofile}\prefs.js":<br>
    <br>
    user_pref("browser.migration.version", 22);<br>
    <br>
    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.<br>
    <br>
    <div class="moz-signature">-- <br>
      <p style="font-family: 'Helvetica', 'Trebuchet MS', Arial,
        sans-serif; font-size: 16px; color: #323232; margin: 0;"><strong>Tiago
          Marques Delboni</strong><br>
        <span style="font-size:16px;">Gerência de Aplicações e Suporte a
          Clientes / GTI<br>
          (31) 2108-7700 </span></p>
      <table style="background-color:#fff;" width="100%" cellspacing="0"
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        <tbody>
          <tr>
            <td width="14%" align="left"><a
                href="http://www.almg.gov.br" title="Portal da
                Assembleia Legislativa de Minas Gerais"><img
                  src="http://mediaserver.almg.gov.br/logo-new.jpg"
                  alt="Assembleia Legislativa de Minas Gerais"
                  moz-do-not-send="true" width="164" height="48"
                  border="0"></a></td>
            <td style="padding:10px 0" width="1"><img
                moz-do-not-send="true"
                src="http://mediaserver.almg.gov.br/divisor.gif"
                opacity="50%" width="1" height="50" border="0"></td>
            <td style="padding-left:24px; font-family:'Trebuchet MS',
              Arial, Helvetica, sans-serif; font-size:11px;
              color:#393840; font-weight:bold;" width="86%" align="left">
              <a href="http://www.facebook.com/assembleiademinas"><img
                  src="http://mediaserver.almg.gov.br/facebook-assembleia.gif"
                  alt="Facebook da Assembleia" moz-do-not-send="true"
                  width="20" height="20" border="0"></a> <a
                href="http://www.twitter.com/assembleiamg"><img
                  src="http://mediaserver.almg.gov.br/twitter-assembleia.gif"
                  alt="Twitter da Assembleia" moz-do-not-send="true"
                  width="20" height="20" border="0"></a> <a
                href="http://www.instagram.com/assembleiademinas"><img
                  src="http://mediaserver.almg.gov.br/instagram-assembleia.gif"
                  alt="Instagram da Assembleia" moz-do-not-send="true"
                  width="20" height="20" border="0"></a> <a
                href="http://www.youtube.com/assembleiamg/"><img
                  src="http://mediaserver.almg.gov.br/youtube-assembleia.gif"
                  alt="Youtube da Assembleia" moz-do-not-send="true"
                  width="20" height="20" border="0"></a> </td>
          </tr>
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