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PAGES LOAD SLOWLY AND BROWSER NON-REPSONSIVE EVERY ACTION TAKEN---EVERY 2-3 SECONDS

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I’ve uninstalled and reinstalled Firefox, cleared the cached, loaded browser in safe mode and all the other usual things and I have researched on-line, Firefox help and forum and made changes that was recommended, but my problem still exist. It took me over 45 minutes to copy this information and send you the message because of the browser hanging up every 2-3 seconds. Please help I really like and need to use FireFox and let me know if you need anything else from me. fundiakita@yahoo.com

I only have three add-ons enabled: 1. Lastpass 2. Saved password manager 3. Wisestamp

I am attaching my: • about:config---browser cache: • About:config – memory settings: • Browser Console: I know this error is a major reason for the hanging of the browser, but not sure how to correct: 12:43:17.356 Attempt to set a forbidden header was denied: Connection 1 1132911464-lcs_client_bin.js:92:385 This is line 92: "Opening Xhr")),this.je=!0,this.l.open(b,String(a),!0),this.je=!1}catch(f){H(this.c,Gf(this,"Error opening Xhr: "+f.message));this.Uc(5,f);return}a=c||"";var e=this.headers.clone();d&&Xe(d,function(a,b){e.set(b,a)});d=Sa(e.ma());c=l.FormData&&a instanceof l.FormData;!(0<=Oa(Df,b))||d||c||e.set("Content-Type","application/x-www-form-urlencoded;charset=utf-8");e.forEach(function(a,b){this.l.setRequestHeader(b,a)},this);this.ng&&(this.l.responseType=this.ng);"withCredentials"in this.l&&this.l.withCredentials!== There is no line 385 THANK YOU!

I’ve uninstalled and reinstalled Firefox, cleared the cached, loaded browser in safe mode and all the other usual things and I have researched on-line, Firefox help and forum and made changes that was recommended, but my problem still exist. It took me over 45 minutes to copy this information and send you the message because of the browser hanging up every 2-3 seconds. Please help I really like and need to use FireFox and let me know if you need anything else from me. fundiakita@yahoo.com I only have three add-ons enabled: 1. Lastpass 2. Saved password manager 3. Wisestamp I am attaching my: • about:config---browser cache: • About:config – memory settings: • Browser Console: I know this error is a major reason for the hanging of the browser, but not sure how to correct: 12:43:17.356 Attempt to set a forbidden header was denied: Connection 1 1132911464-lcs_client_bin.js:92:385 This is line 92: "Opening Xhr")),this.je=!0,this.l.open(b,String(a),!0),this.je=!1}catch(f){H(this.c,Gf(this,"Error opening Xhr: "+f.message));this.Uc(5,f);return}a=c||"";var e=this.headers.clone();d&&Xe(d,function(a,b){e.set(b,a)});d=Sa(e.ma());c=l.FormData&&a instanceof l.FormData;!(0<=Oa(Df,b))||d||c||e.set("Content-Type","application/x-www-form-urlencoded;charset=utf-8");e.forEach(function(a,b){this.l.setRequestHeader(b,a)},this);this.ng&&(this.l.responseType=this.ng);"withCredentials"in this.l&&this.l.withCredentials!== There is no line 385 THANK YOU!
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I am following up on my previous post over two week ago, just in case it was missed. Can someone please respond and help!!!?