I noticed your browser has a number of extensions. Have you, by any chances recently downloaded any crypto-related or some shady ones?
These kind of things usually hijack your copy and paste contents.
None of them are crypto-related unfortunatelly

Even so, the issue you have encountered is not because your extensions are whether crypto or non-crypto related.
What you have encountered is your personal device or computer has malware that you should have removed and you should start avoiding adding more extensions especially those unnecessary ones.