[QA] Updated version of Firefox and Safari to the latest supported one by Sauce Labs

[Željko Filipin]

For more information, please see phab ticket[0] and commit[1] in gerrit.

If you notice anything strange, let me know. Also, if you have any
questions, do not hesitate to ask.

Feel free to forward this e-mail to one or more lists if you think it
should reach more people.

Željko
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0: https://phabricator.wikimedia.org/T91389
1: https://gerrit.wikimedia.org/r/#/c/194101/
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