<<TableOfContents(2)>>
= Firefox =
Mozilla Firefox is a free and open-source web browser developed for Windows, OS X, and Linux, with a mobile version for Android, by the Mozilla Foundation.

== Activate built-in PDF viewer ==

Write '''about:config''' on the browser URL textbox, click on '''"I'll be careful, I promise"'''.

Look for the property '''browser.preferences.inContent''' and set it as true.

Look for the property '''pdfjs.disabled''' and set it as false.

Click on the '''Edit menu''', '''Preferences''', '''Applications''', '''Portable Document Format''' and set it as '''Preview in Firefox'''.

Restart Firefox

== Firefox ESR (Extended Support Release) in Slackware64 14 ==
{{{#!highlight sh
cd /opt
wget http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/latest-esr/linux-x86_64/en-US/firefox-31.3.0esr.tar.bz2
tar xvif firefox-31.3.0esr.tar.bz2 
mv firefox/ firefox-31.3.0esr
ln -s firefox-31.3.0esr firefox
}}}

== Install firefox 52.0.2 (patch) for slackware 14.2 ==
{{{#!highlight sh
wget https://slackbuilds.org/mirror/slackware/slackware-14.2/patches/packages/mozilla-firefox-52.0.2esr-i586-1_slack14.2.txz
upgradepkg mozilla-firefox-52.0.2esr-i586-1_slack14.2.txz
}}}

== Clear cache Firefox 128.7.0esr ==
 * ctrl + shift + del