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Firefox 45.9.0 for OS/2 GA2

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@dmik dmik released this 21 May 21:53
· 5 commits to master since this release

This is a refresh of Firefox 45.9.0 GA1 released in April 2018. We fixed a number of OS/2-specific bugs and made some minor performance and stability improvements. Among those are improved UI responsiveness and fixed Japanese character display.

Please note that Firefox primary distribution format is now RPM. This makes installing it as easy as selecting the firefox package in Arca Noae Package Manager or typing yum install firefox on the command line. Note that you will need a valid Arca Noae OS/2 and eCS Drivers & Software subscription in order to install Firefox from RPM (visit for details). A 7Z distribution is still provided but it's automatically generated from the respective RPM files and you will still need ANPM or the RPM/YUM environment in order to install Firefox dependencies, see below. PLEASE NOTE that the RPM packages undergo internal testing and are currently available only to ArcaOS beta testers. Availability of the packages to all ArcaOS licensees will be announced by Arca Noae separately in their blog.

The CHANGES.OS2 file contains a more detailed list of changes.

The README.OS2 file contains software requirements and detailed installation instructions.

Installing from a 7Z archive

  1. Install ANPM if you prefer GUI or YUM if you prefer command line.
  2. Download the 7Z archive using the download link above and unpack it with arcview or similar to a directory of your choice.
  3. Inspect the RPM_REQUIREMENTS file and install all packages listed there with either ANPM or yum install PACKAGE.
  4. Run the update command in ANPM or yum update on the command line to make sure that you have recent versions of dependent software.
  5. Start Firefox by executing firefox.exe from the @unixroot/usr/lib/firefox-X.Y.Z directory of the unpacked archive.
  6. If your system does not use the UNIXROOT environment, you may discard the entire contents of the archive except the @unixroot/usr/lib/firefox-X.Y.Z directory (which you may move somewhere else and discard the @unixroot/usr/lib part). Note also that starting from Firefox 45.9.0, you don't need to play with LIBPATHSTRICT or use the Run! utility to start multiple copies of different Firefox or Thunderbird versions: firefox.exe does that for you.
  7. If your system uses UNIXROOT, then it's best to move the entire contents of the @unixroot directory from the archive to your UNIXROOT directory (so that @unixroot/usr ends up as %UNIXROOT%\usr and so on). In this case, you will be able to start Firefox by launching %UNIXROOT%\usr\bin\firefox.exe (or just typing firefox.exe on the command line if %UNIXROOT%\usr\bin is on your PATH). Note that in non-UNIXROOT environments the launcher from @unixroot/usr/bin will not work.


  1. If you find a bug (which is likely), please create an issue at the issues page. But before you create a new issue, be sure it is not already reported by searching through the existing ones using the Search field at the top of this page.
  2. When Firefox crashes it creates a trap report that may contain useful information for the developers. These reports are saved in .TRP files created in the directory where firefox.exe is installed. By default these reports contain only basic information. In order to make them even more useful (and therefore make a fix for your problem much more likely) please do the following:
    • Install the latest EXCEPTQ runtime from (currently, this one is the latest).
    • Install the Firefox symbol files by downloading the firefox-debuginfo archive from the link below and unzipping it to the same directory where you installed Firefox.
    • Make Firefox crash again and attach the resulting .TRP file to the issue describing your problem.