Your site recommended that I start Firefox in "safe mode," but despite following the steps, I could not do so, why?

I have used Firefox as my browser for more than seven years, maybe ten.
After the two recent "updates" over the last six weeks or two months, Firefox has been horrible.
It constantly hangs and crashes, cannot access certain basic website, slows start-up, use, and shutdown, and, according to AVG, is using massive memory. Two weeks ago, AVG actually came out and directly recommended that Firefox be completely disabled.
I tried the Firefox recommendation to reset Firefox to default settings. It didn't work.
I tried the Firefox recommendation to start Firefox in "safe mode." But despite following their instructions as to how to do so, I could not start Firefox in safe mode; it just bounced back to the recommendation page.
It seems that Firefox has destroyed itself, and made itself completely unusable as a browser.
At this point, I see little alternative to removing Firefox completely from my computer and changing to Internet Explorer as my browser.
Has anyone had a similar experience, and similar problems, or does anyone have any ideas as to how I can try to salvage Firefox and restore it as a usable browser? Thanks to all who have any comments or ideas.

Please update to the current Firefox 33.1.1 release.
*Help > About Firefox
*https://support.mozilla.org/kb/update-firefox-latest-version.
*https://support.mozilla.org/kb/Updating+Firefox
The Firefox version that you currently run is no longer supported with security updates.
*It is important to update Firefox and add-ons to the latest version to get all security fixes.
You can try to disable OMTC and leave hardware acceleration in Firefox enabled.
*<b>about:config</b> page: layers.offmainthreadcomposition.enabled = false
You can open the <b>about:config</b> page via the location/address bar.
You can accept the warning and click "I'll be careful" to continue.
*http://kb.mozillazine.org/about:config
You can check if you can start Firefox in <u>[[Safe Mode|Safe Mode]]</u> by holding down the Shift/Options key.
Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> 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
*Do NOT click the Reset button on the Safe Mode start window
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

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