Recente antwoorden op Every time I open the Firefox browser first shows the original browser and immediately appears another Firefox browser with another subjects and stay that wayhttps://support.mozilla.org/nl/questions/10952382015-11-20T10:42:24-08:00Your words are confusing. What is in the other unwanted window?
You may have ad / mal-ware. Further 2015-11-20T10:42:24-08:00fredmcd-hotmailhttps://support.mozilla.org/nl/questions/1095238#answer-808810<p>Your words are confusing. What is in the other unwanted window?
</p><p>You may have ad / mal-ware. Further information can be found in the <a href="/en-US/kb/troubleshoot-firefox-issues-caused-malware" rel="nofollow">Troubleshoot Firefox issues caused by malware</a> article.
</p><p>Run most or all of the listed malware scanners. Each works differently. If one
program misses something, another may pick it up.
</p>