If you reload the page using Ctrl+Shift+R (or Shift+click the Reload button on the toolbar), does that make any difference?

Also, you could check whether the redirect block got turned on. Here's how:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

More info on about:config: Configuration Editor for Firefox. The moderators would like us to remind you that changes made through this back door aren't fully supported and aren't guaranteed to continue working in the future. Since we are restoring the default value, I feel comfortable mentioning it.

(2) In the search box in the page, type or paste accessibility.blockautorefresh and pause while the list is filtered

(3) If the preference has a value of true, double-click it to restore the default value of false

PGE has chosen to block the use of Firefox on their site. PGE announced that they no longer support Firefox. I have filed a complaint with the California Public Utility Commission. https://cims.cpuc.ca.gov/complaints