When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site. In this case, you might need to do this for both sites.
(1) Bypass Firefox's Cache
Use Ctrl+Shift+r to reload the page fresh from the server.
(You also can clear Firefox's cache completely using:
orange Firefox button or Tools menu > Options > Advanced
On the Network mini-tab > Cached Web Content : "Clear Now")
(2) Remove the site's cookies (save any pending work first) using either of these. While viewing a page on the site:
Then try reloading the page. Does that help?
Could you describe the error message in more detail? If it can't be copied and pasted, it might be helpful to attach a screenshot (use the "Browse" button below the text box). This article might help: How do I create a screenshot of my problem?
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
Same problem here. (windows xp/firefox 17.0 beta channel) Safe mode does not work. This has only been an issue for like 3 weeks.
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The system error is from the banks page.
I have had the same problem. I contacted the bank and they said that firefox 17.0.1 did not have the necessary security level, that I should use the older version version 3.6 !!!!! When I try to log in to the site it goes blank again with NO error message.
Hi jumbuc, your bank's advice is ridiculous. Perhaps what they meant is that they require certain add-ons and those are not compatible with Firefox 17? Either way, have you tried using a different (but equally up-to-date) browser?