Fix exception: IndexSizeError Failed to execute 'setStart' on 'Range'

[maxwroc]

[/app.js:1568][0.9.3.6] Uncaught IndexSizeError: Failed to execute 'setStart' on 'Range': The offset 13675 is larger than the node's length (3414).
[/app.js:1568][0.9.3.6] Uncaught IndexSizeError: Failed to execute 'setStart' on 'Range': The offset 5581 is larger than the node's length (3279).

[maxwroc]

since the root casue is not clear and it happened only twice for one user - closing

[maxwroc]

Reopening as it happened again

[/popup.js:1193][0.9.4.0] Uncaught IndexSizeError: Failed to execute 'setStart' on 'Range': The offset 658146 is larger than the node's length (65536).