[orca-list] Mouse review: On Firefox, on body of pages, orca only reads the start page and doesn't seem to see new pages

[Alex ARNAUD <alexarnaud hypra fr>]

Hello all,

Environment:
- Debian Sid
- Firefox 61 with e10s enabled
- Orca master

Steps to reproduce:
1) Open Firefox with the native start page
2) Write "test" to search for test on Google
3) Wait the loading of the page
4) Move over top links

Result: Orca seems to read the start page again

Expected result: Orca should be able to read the new loaded page

Best regards,
Alex.