Hi, sorry I wasn't clear on that.
First, most sources on web (from what I can find when searching for "force update Firefox") say that the only way is to use the programs "about" dialog box in order to make FF find an updated version automatic. In live-cd session that simply doesn't happends, FF doesn't offer the option to update itself.
Software manager doesn't offer a newer version of FF than 50.0.2.
Anyway - I don't have that critical need for exactly Firefox, so I have started trying Midori and Qupzilla - and even Lynx. This is my little unofficial test on those web browser running on this specific computer.
Very unstable (maybe due to lack of sse2 on cpu?). A typical norwegian newspaper (lot of interactive contents and ads) seems to load fine, until the program just quit.
On this forum: I managed to log in to this forum to tell you guys that I was using Midori, but it self-terminated without error message while I was writing test into the edit field. So I gave up using Midori.
Seems to be stable enough to use. In fact I use Qupzilla right now when I write this.
However, a typical norwegian news site will probably make the program self-terminate.
So therefore I decided to open those web browsers from Terminal just to see if the self-terminations gives any error messages, and it does:
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<username>@<computername> ~ $ midori
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-0ubuntu1.16.04.2-b11)
OpenJDK Server VM (build 25.131-b11, mixed mode)
<username>@<computername> ~ $ qupzilla
AdBlockSubscription:: loadSubscription invalid format of adblock file "/home/<username>/.config/qupzilla/profiles/default/adblock/customlist.txt"
QupZilla: 0 extensions loaded
QIODevice::read (QFile, "/home/<username>/.config/qupzilla/profiles/default/cookies.dat"): device not open
<username>@<computername> ~ $
Without knowing the details about browser engines and that kind of stuff I can only guess that those web browsers use those sse2 resource when it gets to a web page that requires it. I really don't know.
For a Linux newbie I just had to give this a go. It was actually quite fun reading the news using Lynx - absolutely no graphic ads whatsoever.
It reminds me of text-tv that was common from the 90's.
However - I couldn't log into this forum, I got this in return:
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←←←→→→ Sucuri Website Firewall
Website Firewall Back to sucuri.net
Access Denied - Sucuri Website Firewall
If you are the site owner (or you manage this site), please whitelist your IP or you think this block is an error please open a support ticket and
make sure to include the block details (displayed in the box below), so we can assist you in troubleshooting the issue.
Your IP: 126.96.36.199
Your Browser: Lynx/2.8.9dev.8 libwww-FM/2.14 SSL-MM/1.4.1 GNUTLS/3.4.9
Block ID: FBP006
Block reason: Fake bot access.
Time: Mon Jun 5 19:00:49 2017
Server ID: cp15008
© 2017 Sucuri Inc. All rights reserved. All rights reserved. Privacy
So I'll continue using Qupzilla some time and browsing through some common forums. I consider setting the thread as solved because lack of SSE2 seems to be the main reason because FF doesn't work.
So I got this bright idea. But when I tried to grab the light bulb, I did not hurt my hands as expected from a warm bulb, because it turned out to be one of those LED bulbs.