Firefox is not enabling/installing the Codec. "..will be installed shortly" error.

[faysalnadim]

Can someone please suggest a solution to this issue? I have spent hours trying to find a remedy for it but failed.

Operating System: Red Hat Enterprise Linux 9.1 (Plow)
CPE OS Name: cpe:/o:redhat:enterprise_linux:9::baseos
Kernel: Linux 5.14.0-162.22.2.el9_1.x86_64
Architecture: x86-64
Hardware Vendor: Dell Inc.
Hardware Model: XPS 13 9380

[dacianstremtan]

I have the same problem:
NAME="Rocky Linux"
VERSION="9.1 (Blue Onyx)"
ID="rocky"
ID_LIKE="rhel centos fedora"
VERSION_ID="9.1"
PLATFORM_ID="platform:el9"
PRETTY_NAME="Rocky Linux 9.1 (Blue Onyx)"
ANSI_COLOR="0;32"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:rocky:rocky:9::baseos"
HOME_URL="https://rockylinux.org/"
BUG_REPORT_URL="https://bugs.rockylinux.org/"
ROCKY_SUPPORT_PRODUCT="Rocky-Linux-9"
ROCKY_SUPPORT_PRODUCT_VERSION="9.1"
REDHAT_SUPPORT_PRODUCT="Rocky Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="9.1"

[faysalnadim]

Are your running ESR version of Firefox?

I would suggest to install the latest version of Firefox using this link.

• https://support.mozilla.org/en-US/kb/install-firefox-linux#w_install-firefox-from-mozilla-builds-for-advanced-users
• Go to "Install Firefox from Mozilla builds (For advanced users)"

This had helped me resolve this issue. I replaced Redhat-8 in the links to Redhat-9 when needed, use the referenced links to find the exact path to the relevant file.
https://access.redhat.com/discussions/6334751

[Darkspirit]

This issue can be closed.
This message is shown by Firefox if the plugin is loaded via MOZ_GMP_PATH environment variable.
Fedora's mozilla-openh264 package does this, for example.
The plugin should work and you can ignore this message.