firefox: fix install for oe-core master and cleanup packaging
firefox: fix install for oe-core master and cleanup packaging

Could build test only due to lack of building image

Signed-off-by: Andreas Müller <d72a15aaaca3a7afa855175c72dc8d2e05931e32@googlemail.com>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

twoerner/meta-browser,webdino/meta-browser,shr-distribution/meta-browser,schnitzeltony/meta-browser,OSSystems/meta-browser,OSSystems/meta-browser,webdino/meta-browser,twoerner/meta-browser,OSSystems/meta-browser,kraj/meta-browser,kraj/meta-browser,webdino/meta-browser,schnitzeltony/meta-browser,OSSystems/meta-browser,kraj/meta-browser,schnitzeltony/meta-browser,kraj/meta-browser,webdino/meta-browser,shr-distribution/meta-browser,shr-distribution/meta-browser,twoerner/meta-browser,schnitzeltony/meta-browser,shr-distribution/meta-browser,webdino/meta-browser,twoerner/meta-browser