Comment # 3 on bug 933809 from macias -

# rpm -qa | grep -i libwebkit2gtk
libwebkit2gtk3-lang-2.6.6-7.2.noarch
libwebkit2gtk-4_0-37-2.6.6-7.2.x86_64

And just in case:

# rpm -qa | grep -i cairo
python3-gobject-cairo-3.14.0-1.2.x86_64
python-gobject-cairo-3.14.0-1.2.x86_64
libcairo2-1.12.16-7.1.4.x86_64
libcairo2-32bit-1.14.0-7.8.1.x86_64
python-cairo-1.10.0-14.1.3.x86_64
libcairo-gobject2-1.12.16-7.1.4.x86_64
libcairomm-1_0-1-1.11.2-2.1.3.x86_64
libcairo-script-interpreter2-1.12.16-7.1.4.x86_64
cairo-devel-1.12.16-7.1.4.x86_64

Please note -- none of the cairo libs were altered during installation of
balsa. So if some cairo lib is required with newer version, balsa or
libwebkit2gtk should define it in its dependency.