You might want to look at this thread,
https://forums.opera.com/topic/2007/permanently-pinned-tabs
where the issue was how to keep permanently pinned tabs through shutdown of the browser and then startup. The Chrome extension, Real Pinned Tabs was used to get it done. https://chrome.google.com/webstore/detail/real-pinned-tabs/imdpkhkoopjbdmjppehmpkngncogadbk