* nongnu/packages/mozilla.scm (firefox-esr): New variable, previously package
definition of firefox.
[phases]: New phase set-build-id moved from configure. In configure set
MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE which replaced MACH_USE_SYSTEM_PYTHON.
Set GUIX_PYTHON_PATH.
[inputs]: Use icu4c-71.
[native-inputs]: Use rust-cbindgen-0.23.
[description]: Mention that it's now the ESR branch.
(%firefox-esr-build-id): New variable.
(firefox-esr/wayland): New variable. Adjusted packaged definition of
firefox/wayland.
(firefox): Inherit from firefox-esr.
Co-authored-by: Jonathan Brielmaier <jonathan.brielmaier@web.de>
Signed-off-by: Jonathan Brielmaier <jonathan.brielmaier@web.de>
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