Moodle 26 - check_browser_version has been deprecated

[ghost]

Testing with Moodle 2.6.2

web content
check_browser_version has been deprecated, please update your code to use core_useragent instead.line 4579 of /lib/deprecatedlib.php: call to debugging()
line 174 of /mod/tab/locallib.php: call to check_browser_version()
line 221 of /mod/tab/view.php: call to tab_embed_general()

Other notices:
get_context_instance() is deprecated, please use context_xxxx::instance() instead.

line 4020 of /lib/deprecatedlib.php: call to debugging()
line 54 of /mod/tab/view.php: call to get_context_instance()