Here is script I use to install Vivaldi 1.15 in TC 9.x x86
#!/bin/busybox ash
cd /home/tc
tce-load -iw gtk3.tcz
tce-load -iw libasound.tcz
tce-load -iw libcups.tcz
tce-load -iw nss.tcz
wget http://downloads.vivaldi.com/stable/vivaldi-stable_1.15.1147.36-1_i386.deb
ar x vivaldi-stable_1.15.1147.36-1_i386.deb
cd /
sudo tar fxJ /home/tc/data.tar.xz
cd /home/tc
rm -f _gpgbuilder
rm -f control.tar.gz
rm -f data.tar.xz
rm -f debian-binary
rm -f vivaldi-stable_1.15.1147.36-1_i386.deb
wget http://mirror.esecuredata.com/ubuntu/pool/universe/c/chromium-browser/chromium-codecs-ffmpeg-extra_65.0.3325.181-0ubuntu0.16.04.1_i386.deb
ar x chromium-codecs-ffmpeg-extra_65.0.3325.181-0ubuntu0.16.04.1_i386.deb
tar fxJ /home/tc/data.tar.xz
rm -f control.tar.gz
rm -f data.tar.xz
rm -f debian-binary
rm -f chromium-codecs-ffmpeg-extra_65.0.3325.181-0ubuntu0.16.04.1_i386.deb
cd usr
cd lib
cd chromium-browser
sudo cp libffmpeg.so /opt/vivaldi/lib/
cd /home/tc/
sudo rm -r usr
sudo ln -s /usr/local/etc/fonts/ /etc/
cd /opt/vivald*
./vivaldi-bin