拜耳冲牙器m3和m6 RBC online Banking, Signs Out When selecting 'Activity' for my account

This issue can be caused by corrupted cookies or cookies that are blocked.

check the permissions for the domain in the currently selected tab in "Tools -> Page Info -> Permissions"

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

make sure your extensions and filters are updated to the latest version https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Firefox shows the shield icon at the left end of the location/address bar in case Content Blocking is blocking content.

click the shield icon for more details and possibly disable the protection

You can check the Web Console about what content is blocked

"3-bar" menu button or Tools -> Web Developer https://support.mozilla.org/en-US/kb/content-blocking

You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

hold down the Shift key and left-click the Reload button press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux) press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Remove the Cookies" from websites that cause problems:

Options/Preferences -> Privacy & SecurityCookies and Site Data -> Manage Data

"Clear the Cache":

Options/Preferences -> Privacy & SecurityCookies and Site Data -> Clear Data -> Cached Web Content: Clear

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes do NOT click the "Refresh Firefox" button on the Safe Mode start window https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems