Edit C:\ProgramData\Mozilla\updates\308046B0AF4A39CB\active-update.xml
<?xml version="1.0"?><updates xmlns="http://www.mozilla.org/2005/app-update"><update xmlns="http://www.mozilla.org/2005/app-update" appVersion="88.0" buildID="20210415204500" channel="release" detailsURL="https://www.mozilla.org/es-ES/firefox/88.0/releasenotes/" displayVersion="88.0" installDate="1620155635283" isCompleteUpdate="true" name="Firefox 88.0" previousAppVersion="86.0.1" promptWaitTime="691200" serviceURL="https://aus5.mozilla.org/update/6/Firefox/86.0.1/20210310152336/WINNT_x86_64-msvc-x64/es-ES/release/Windows_NT%206.1.1.0.7601%20(x64)/ISET:SSE3,MEM:16383/default/default/update.xml" type="minor" statusText="No se pudo instalar la actualización (fallo al aplicar el parche)" actions="showURL" openURL="https://www.mozilla.org/firefox/88.0/whatsnew/all/?oldversion=%OLD_VERSION%"><patch size="60835614" type="complete" URL="https://download.mozilla.org/?product=firefox-88.0-complete&os=win64&lang=es-ES" selected="true" state="downloading" hashFunction="sha512" hashValue="1d354600606134da92ad17cf5312291f992347f7e7b53068d0978eb84e2105b6c775a999ff46caef99a51e1e64bb540e93df26bfbe460336c03511ecea6acab4" bitsId="{34FAB000-B20F-42D0-B6D3-A5B0D55366A2}"/><patch size="18514544" type="partial" URL="https://download.mozilla.org/?product=firefox-88.0-partial-86.0.1&os=win64&lang=es-ES" errorCode="79" state="failed" hashFunction="sha512" hashValue="8495685ca1f1dbb6530a0fee3dd0965e6eff7183bec69b36c3621aab0ce4a77a1f0b71c37d15b0d6ba5b6a9cb265904d4fa81e5f8ab899f30cae0fff8835464b" bitsId="{E1EF8856-030C-4933-8404-20BD5DE4BAF1}" bitsResult="0"/></update></updates>
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