Description of problem:
Fedora 25 x86_64 build of Firefox 52 has broken TLSv1.3 support, security.tls.version.max = 4 has no effect.

Version-Release number of selected component (if applicable):
firefox-52.0-1.fc25.x86_64

Steps to Reproduce:
1. mv .mozilla .mozilla.OK (so Firefox starts with defaults and no plugins)
2. Set security.tls.version.max to 4 in about:config
3. Restart Firefox 52
4. Verify that security.tls.version.max is really 4
5. Open webpage with TLSv1.3 support (e,g, https://www.cloudflare.com/ or https://test.felsing.net)

Actual results:
Fedora 25 Firefox negotiates to TLSv1.2, only even if web site supports TLSv1.3. 
Original Mozilla Firefox binaries negotiates TLSv1.3.

Expected results:
Fedora 25 Firefox 52 should behave like Original Mozilla Firefox 52 and should negotiate to TLSv1.3 if security.tls.version.max is 4 and remote supports TLSv1.3.

Additional info:

build information of firefox-52.0-1.fc25.x86_64

about:buildconfig
Build platform
target
x86_64-unknown-linux-gnu
Build tools
Compiler 	Version 	Compiler flags
/usr/bin/gcc -std=gnu99 	6.3.1 	-Wall -Wempty-body -Wignored-qualifiers -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -fno-lifetime-dse -O2 -g -pipe -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -Wformat-security -Wformat -Werror=format-security -fno-delete-null-pointer-checks -fPIC -Wl,-z,relro -Wl,-z,now -fno-strict-aliasing -ffunction-sections -fdata-sections -fno-math-errno -pthread -pipe
/usr/bin/g++ -std=gnu++11 	6.3.1 	-Wall -Wc++11-compat -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wc++14-compat -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -fno-lifetime-dse -O2 -g -pipe -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -Wformat-security -Wformat -Werror=format-security -fno-delete-null-pointer-checks -fPIC -Wl,-z,relro -Wl,-z,now -fno-exceptions -fno-strict-aliasing -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -pthread -pipe -g -freorder-blocks -Os -fomit-frame-pointer
Configure options

--enable-application=browser --disable-tests --enable-rust --enable-system-ffi --enable-default-toolkit=cairo-gtk3 --with-mozilla-api-keyfile=../mozilla-api-key MAKE=make --enable-system-hunspell --enable-gio --enable-necko-wifi --enable-official-branding --enable-optimize --enable-pie --enable-pulseaudio --enable-release --enable-startup-notification --disable-strip --disable-system-cairo --disable-system-sqlite --disable-updater --enable-url-classifier --libdir=/usr/lib64 --prefix=/usr --with-pthreads --with-system-bz2 --without-system-icu --with-system-jpeg --with-system-libvpx --with-system-nspr --with-system-nss --with-system-zlib