Spark 2.5.1beta1linux versions.
Copying and pasting a URL to the spark conversation window will bring up a browser on the local machine. I’'m not too sure how useful the behavior is. If it was intended could a preference be made to turn it off.
To recreate:
Open up a new Spark client.
Start a chat with someone.
Copy a URL and paste it into Spark.
Hit return to send the message.