Assertion: browser's version | /r/HasProperty | based on the presto layout engine
Facets:
Source sentences:
text: In January 2017, the source code of Opera 12.15 (one of the last few versions that was still based on the Presto layout engine) was leaked.
text: In January 2017, the source code of Opera 12.15 (one of the last few versions that was still based on the Presto layout engine) was leaked.