Firefox takes 4 minutes to start since the recent upgrade. Can you help?

Since Firefox was upgraded to the latest version about 5 days ago, it has become extremely slow to start. It is taking just about 4 minutes. As soon as I experienced this problem, I removed it completely from my computer. I subsequently reinstalled it but this did not improve matters in any way. I have applied your suggested fixes for this problem but have not had any success. My operating system is Windows 7 Pro, and my computer is an Acer Laptop (model Aspire 7535).
sincerely,
Charles D. Cross

You can check if you can start Firefox in [[Safe Mode|Safe Mode]] by holding down the Shift/Options key.
It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

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