Install Firefox 26 on Fedora 20/19, CentOS/Red Hat (RHEL) 6.5

Mozilla Firefox 26 is released and this is guide, howto install Firefox 26 on Fedora 20/19/18/17/16, CentOS 6.5/6.4/6.3/6.2/6.1/6 and Red Hat (RHEL) 6.5/6.4/6.3/6.2/6.1/6 using YUM. Firefox 17 ESR (Extended Support Release) is currently available on CentOS 6.5/5.10 and Red Hat (RHEL) 6.5/5.10 own repos, so with this guide you can also install Firefox 17 ESR on CentOS 5.10 and Red Hat (RHEL) 5.10.

What’s new in Firefox 26

  • All Java plug-ins are defaulted to ‘click to play’
  • Password manager now supports script-generated password fields
  • Support for H.264 on Linux if the appropriate gstreamer plug-ins are installed
  • Support for the CSS image orientation property
  • There is no longer a prompt when websites use appcache
  • Various security fixes

What’s new in Firefox 17 (ESR)

  • First revision of the Social API and support for Facebook Messenger
  • Updated Awesome Bar experience with larger icons
  • JavaScript Maps and Sets are now iterable
  • Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use
  • New Markup panel in the Page Inspector allows easy editing of the DOM
  • Sandbox attribute for iframes implemented, enabling increased security
  • Over twenty performance improvements, including fixes around the New Tab page
  • Security fixes

Read full details from Firefox 26 release notes and Firefox 17 release notes.

Install Mozilla Firefox 26/17 on Fedora 20/19/18/17/16, CentOS 6.5/6.4/6.3/6.2/6.1/6/5.10 and Red Hat (RHEL) 6.5/6.4/6.3/6.2/6.1/6/5.10

1. Backup your current Firefox 3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25 profiles (just in case)

tar -cvzf $HOME/mozilla-firefox-profiles-backup.tar.gz $HOME/.mozilla/firefox/

2. Change root user

su -
## OR ##
sudo -i

3. Install Remi repository

Note: Currently not needed on Fedora 20/19/18, CentOS 5.10 and Red Hat (RHEL) 5.10.

Fedora 17/16

## Fedora 17 ##
rpm -Uvh
## Fedora 16 ##
rpm -Uvh

CentOS 6 / Red Hat (RHEL) 6

## Remi Dependency on CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh
## CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh

4. Check Available Firefox versions

Fedora 20/19/18

yum list firefox

Fedora 17/16, CentOS 6.5 and Red Hat (RHEL) 6.5

yum --enablerepo=remi list firefox

CentOS 5.10 and Red Hat (RHEL) 5.10

yum list firefox

Note: Firefox 17 ESR available.

5. Update or Install Mozilla Firefox 26/17

Fedora 20/19/18

yum update firefox
## OR ##
yum install firefox

Fedora 17/16, CentOS 6.5 and Red Hat (RHEL) 6.5

yum --enablerepo=remi update firefox
## OR ##
yum --enablerepo=remi install firefox

CentOS 5.10 and Red Hat (RHEL) 5.10

yum update firefox
## OR ##
yum install firefox

Note: Firefox 17 ESR available.

6. Start Firefox 26/17

Then start Firefox with using command:


Or use Firefox (26/17) launcher.

Firefox 21/20/17 Screenshots

Firefox 21 running on CentOS 6.4

firefox 21 on CentOS 6.4

Firefox 20 running on Fedora 18

Ffirefox 20 on Fedora 18

Firefox 17 running on CentOS 5.9

Firefox 17 ESR on CentOS 5.9

Follow If Not True Then False Updates!


  1. I’m using RHEL-6.4 and i don’t have RHN subscription.

    • You need RHN subscription to install needed dependencies on RHEL 6.

  2. Hi, why firefox 27 is not in remi repository?

    • Hi George,

      I’m not sure, but I guess that it’s coming soon.

  3. Worked from the first time! Thanks!

  4. Not so soon, because this version is released on 4-feb-2014 now is 11-mar-2014. After week or two they will release firefox 28.

    • Hi again George,

      Just checked Remi’s forum and I found that the reason is the lack of time. So maybe next build is Firefox 28 then.

  5. linux is stupid. i am so glad i use os x!!!!! all i have to do is open my firefox browser and if i need an update it AUTOMATICALLY INSTALLS. you linux users have been jipped by a lousy os. you have to type in commands to a freaking terminal and hope for the best that the update does not break your computer. you have to pay money to subscribe to something that gives you updates that are totally free to everybody else that has a decent os.

  6. linux? WHAT A JOKE!!!!!

    • Hi Robert,

      This is your opinion. OSX is nice os, it have excellent base (UNIX) and works nicely with Mac hardware.

      I totally disagree your points about Linux.

      – Linux is free, you don’t have to pay anything (some distros have subscription model, but you pay mainly support). Actually OSX users have to pay first their os (you can’t get OSX without Mac) and you have to pay even major version updates, right?
      – Linux have automatic updates as well and actually even better controlled updates, than OSX. Example CentOS/RHEL or Debian stable are very stable systems and all packages are tested before release (I mean really well tested). OSX updates are mainly managed by software developers and not always so well tested.
      – When use Linux, you can install and update almost every packages from repos, using package management systems (yum, apt, etc.).
      – You can update packages and whole distribution without terminal or using terminal.

      One thing to think, when you say that Linux is just a joke:
      – Most Internet services, like websites, mail systems etc. are powered by Linux (& Windows). Some studies says that the Linux market share is something between 58-78%, when OSX market share is 0-2%.

      After all Linux is designed to be fully usable without any GUI, when OSX is mainly Desktop OS, just like Windows. Macs are very expensive if we think pure processing power. If you want to pay just beautiful & quality design, but get basic hardware, then Macs are good choice.

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