First of, some revelant tidbits about my browsing-related settings:
Firefox 27.0.1, to which I updated this morning I believe.
I did not change any proxy settings in Firefox.
The problem does not occur in Chromium.
Active add-ons are:
Reddit Enhancement Suite 188.8.131.52
Ubuntu Firefox Modifications 2.8
Since my latest boot, which was circa 2 hours ago, I have to "full refresh" every single page I visit. It says "Page not found" on each first visit, whether it is askubuntu.com, reddit.com, twitter.com and so forth. Sometimes I even have to hit
Ctrl + R twice or thrice. Before this, I think in the last 24 hours, I sometimes (although in a very rare fashion) experienced some pages not loading fully.
What is causing this? How can I solve this issue?
Additional info after DK Bose's posts
With all extensions disabled it worked sporadically better I'd, but sometimes just as buggy, for example with ubuntu-manual.org.
Starting Firefox with a new profile (via
firefox -ProfileManager) also didn't change things:
reddit.com wasn't found: http://imgur.com/3JUNcBW
ubuntuusers.de was loaded only partially: http://imgur.com/LHdwV06
I'd say it was equally bad. As reddit.com and ubuntuusers.de were loaded just normally in Chromium, it seems to be connected to Firefox on Ubuntu. Hm... really do not have a clue what is happening.