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speed problem is ISP line v FFox Browser problem

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New User

speed problem is ISP line v FFox Browser problem

OK, ive had some bad couple of days with surfing / using firefox broswer and every so often.. it is so slow I can type faster than my cursor is moving.

so abnormal slow speed.


Now this has happened in the past... long time ago.. then went away... dont know what changed... and now its back


so i would LOVE someone technical to map out the steps. Opening Ffox in safe mode is not doing trick. --- ISP on their line test (testing wireless, surfing using FFox 17.01) gets "13mbps"

My little WIFI indicator is showing 0.3kB/S

see screenshot

my ISP refutes that my little wifi indicator is the Truth.

So now I am rock stuck in between with poor surfing speed (occassional)


So I need steps to eliminate the possible culprit. As each time the speed goes down to very very slow the root cause could be different.

so help me out...

1 perform speed test using ISPs online speed test e.g. gets 13mbps

2 see what my little wifi indicator says e.g. 0.3kB/S

3??? 4 ??? 5 ??

(its not helpful to open firefox in safe mode, as it means i have to close down browswer, so i cannot check what is the problem, right then and there, when i have the problem) what is the suggestion in this case?

7 REPLIES
New User

Re: speed problem is ISP line v FFox Browser problem

screenshot showing ISP line test of 13mbps and my little WIFI indicator of 0.3kb/s

2013-01-22-14-32-42-a3326c.png
Site Moderator

Re: speed problem is ISP line v FFox Browser problem

You can check for problems with the sessionstore.js and sessionstore.bak files in the Firefox Profile Folder that store session data.

Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder.

Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).


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).

  • Do NOT click the Reset button on the Safe mode start window or otherwise make changes.
New User

Re: speed problem is ISP line v FFox Browser problem

it just did it again, this time trying to access the Firefox Add-on page about:addons

see screenshot

New User

Re: speed problem is ISP line v FFox Browser problem

test case 2:

2013-01-22-15-06-24-2217b7.png
New User

Re: speed problem is ISP line v FFox Browser problem

um... you say i need to recreate my bookmark bar crikey that is a huge effort its full -- if that is what your saying, i need another method --- as i said opening in safe mode, is useless as it takes you away from problem, takes you away from page. --- sorry Co-rel, but i am really struggling to have a methodical list of steps to troubleshoot. versus try this and it might.... and it cost me heaps of time to get back to where i was e.g. recreate my bookmark bar

New User

Re: speed problem is ISP line v FFox Browser problem

nothing in my profile folder ??? please see screenshot

definitely in my user folder / library

from help link: Mac Profile folders are in one of these locations: ~/Library/Mozilla/Firefox/Profiles/<profile folder> ~/Library/Application Support/Firefox/Profiles/<profile folder> The tilde character (~) refers to the current user's Home folder, so ~/Library is the /Macintosh HD/Users/<username>/Library folder.

2013-01-22-15-15-07-5632ba.png
New User

Re: speed problem is ISP line v FFox Browser problem

i think i need something like this but for MAC - so i can isolate if its a web page problem or a frefox problem or an ISP line speed problem

Html Validator by Marc Gueury

Add to Firefox Not available for your platform

   HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon.

is there anything like this for MAC ?