How can I fix the OS X dictionary lookup feature for StackExchange comments in Google Chrome? When I use the "Look up word" right-click menu option on a StackExchange comment in OS X, the system selects other text and looks that up instead:

Step 1: select a word in a StackExchange comment to look up



Step 2: right click &amp; "Look up word"



Step 3: watch OS X select some other text next to yours and look that up instead:




Why?
How can I fix this?


I'm using OS X 10.10.5.

It appears to shift the selected text by 10 characters to the right in all cases, and happens in Chrome but not Safari.
I'd be tempted to try the "standard toolkit"…

Do all of these, in this order.


Reset the SMC
As I don't know which Mac you have, read this for instructions for your specific machine - https://support.apple.com/HT201295
Reset the NVRAM
At the boot chimes, hold  Cmd ⌘   Opt ⌥   P   R 
Keep holding all 4 keys until you hear the chimes again, then release.
Fix permissions, Verify &amp; if necessary Repair disk, using Disk Utility
Reset Home folder permissions &amp; ACLs using OnyX  [make sure you get the version appropriate to your OS]  - Maintenance tab/permissions, tick the box at the top then Execute.
Re-apply the 10.10.5 update using the 10.10.5 combo update, not the delta from App Store