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Can't resolve recurring 404 error, also Firefox start up requires 'New session' every time.

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  • 1 has this problem
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  • Last reply by mannlett4

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2 issues. 1) Have used Firefox for years on Windows 10 on a laptop. For the last 2 months I have had great difficulty signing in to do online banking with Bank of Montreal (BMO). I get a lot of 404 error messages. Clearing the cache and history works occasionally, but not consistently. I do not have this problem when I use Chrome and I do not have this problem with any other site. This is really frustrating and inconvenient because it is so inconsistent and yet so important. 2) For the last month, every time I start Firefox I get a message telling me Firefox was unable to find previous settings and I have to select 'Start new Session' as it seems unable to restore itself otherwise. Any ideas? Thanks in advance.

2 issues. 1) Have used Firefox for years on Windows 10 on a laptop. For the last 2 months I have had great difficulty signing in to do online banking with Bank of Montreal (BMO). I get a lot of 404 error messages. Clearing the cache and history works occasionally, but not consistently. I do not have this problem when I use Chrome and I do not have this problem with any other site. This is really frustrating and inconvenient because it is so inconsistent and yet so important. 2) For the last month, every time I start Firefox I get a message telling me Firefox was unable to find previous settings and I have to select 'Start new Session' as it seems unable to restore itself otherwise. Any ideas? Thanks in advance.

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Sorry for the late reply. Been in Hospital.

mannlett4 said

Over 2 months ago I installed a program called Open Shell which makes Windows 10 look like Windows 7. Since removing this shell, I have been able to do online banking as normal.

That was very good work. Well Done. Please flag your https://support.mozilla.org/en-US/questions/1366895#answer-1483402 post as Solved Problem as this can help others with similar problems. Go to that post and click the 'Solved' button to its right.

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Sorry to say, this bank issue is still not solved. It was fine for about 2 weeks, then the 404 error messages started up again. They seem to be worse at busier times of the day. If I am blocked from banking during the day I may find that I can access the account later in the evening. Not consistently, though.

Interestingly, the issue with the 'about:sessionrestore' page, carried on for several days after removing the shell, but I have not had that re-occur for several weeks now. I can't say exactly when it disappeared.

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PS Very sorry to hear you have been sick

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