I updated to Stable Version Version:63.0.3368.75. It crashes from time to time. I haven't discerned just why, but it seem correlated with my changing tabs while a tab is still loading. In other words, it doesn't see to handle memory management as well as previously. The console system. log recorded for the last crash the following:
Sep 8 20:37:14 MacBook-Air-4 com.apple.xpc.launchd[1] (com.operasoftware.Opera.10416[11106]): Service exited due to signal: Illegal instruction: 4 sent by exc handler[0]

I am running Opera on my MacBook Air with Mac OS 10.12.6.

P.S. Rebooted and starting working. Crashed again:
Sep 8 20:54:37 MacBook-Air-4 com.apple.xpc.launchd[1] (com.operasoftware.Opera.10416[11474]): Service exited due to signal: Illegal instruction: 4 sent by exc handler[0]

I don't understand the option called "distill page".

Since Opera hasn't responded with a fix, I switched to Firefox.

I updated to Stable Version Version:63.0.3368.75. It crashes from time to time. I haven't discerned just why, but it seem correlated with my changing tabs while a tab is still loading. In other words, it doesn't see to handle memory management as well as previously. The console system. log recorded for the last crash the following:
Sep 8 20:37:14 MacBook-Air-4 com.apple.xpc.launchd[1] (com.operasoftware.Opera.10416[11106]): Service exited due to signal: Illegal instruction: 4 sent by exc handler[0]

I am running Opera on my MacBook Air with Mac OS 10.12.6.

P.S. Rebooted and starting working. Crashed again:
Sep 8 20:54:37 MacBook-Air-4 com.apple.xpc.launchd[1] (com.operasoftware.Opera.10416[11474]): Service exited due to signal: Illegal instruction: 4 sent by exc handler[0]

Even though I have not checked "Delay loading of background tabs," my pinned tabs do not load until I have clicked on them and only as long as I have the tab open. By contrast, background loading does work for regular tabs.

I am running Version: 58.0 on OS 10.12.6. I doubt that the hardware is relevant, but FYI it is mounted on an 2010 MacBook Air, running a 2.13 GHz Intel Core 2 Duo with an NVidia GEForce graphics card.