Make sure that you aren't blocking content from addons.cdn.mozilla.net.

You can check the Network log in the Web Console (Firefox/Tools > Web Developer) (refresh the page to update/generate the log).

• https://developer.mozilla.org/Tools/Web_Console

cor-el,

Initially when I ran the Network log thing and loaded problem pages / refreshed pages, it did not appear to change or repair the "loading text only fault. I then flushed [everything] all history, closed Firefox 28.0 and repeated the process, opened the Network log console and loaded "Welcome to Firefox" page [still displaying as text only] and "Get Add-ons" internal page from Tools\Add-ons [still displaying as text only], "Plugin Check & Updates" [still displaying as text only], refreshed each page in turn - Ctrl+Alt and R and everything loaded normally again. Nice to see pictures, logos, video content etc.

I flushed all history again, closed Firefox, opened Firefox and checked problem pages were loading as they should - all sorted. Not too sure I fully understand what running the Web Console changed within Firefox settings but it did the trick - normal service has resumed!

Will now go and update Firefox to latest version and perform same trick on other four machines - Your a star!

Jewelie

Unfortunately the boss man ordered another batch of these machines for our other office and I have the same 'text only' problems as before. The first five machines from two weeks ago are working great after the suggested fix? by cor-el. These new machines are the exact same model / part number / mfg date etc and same Windows 7 x64 factory install as the first batch.

Installed all available Microsoft live updates to all but this months [April], installed all usual base software as listed in first post, opened Firefox 28.0 and the text only issues are back. Opened the Network log thing and loaded problem pages / refreshed pages, it did not appear to change or repair the "loading text only fault. I then flushed [everything] all history, closed Firefox 28.0 and repeated the process, opened the Network log console and loaded "Welcome to Firefox" page [still displaying as text only] and "Get Add-ons" internal page from Tools\Add-ons [still displaying as text only], "Plugin Check & Updates" [still displaying as text only], refreshed each page in turn - Ctrl+Alt and R and the text only thing remains. I have flushed History, closed Firefox, reopened and repeated many times but text only remains - css styles sheets not loading?

These machines are driving me nuts, already told boss man to order no more of these things. I have performed hundreds of bare metal installs and set-up as many machines and have never come across this problem before with any installation except these Acer factory installed machines. Something within these factory installed machines is clashing with Firefox, Yet again I Acronis imaged a box to play with, performed 1st power on / very first boot into this factory install, changed nothing, installed Firefox 28.0 and opened all the usual pages, displaying as text only, no images or formatting straight out the box. There are no updated drivers available for any component within the box, they already have latests drivers installed. These was very little in the way of pre-loaded software as I halted the auto install Acer garbage script on first boot.

Yet again open to suggested fix for Firefox

Minor update and workaround but still no fix: installing and uninstalling testing versions of Firefox again - if I stick with the bare Windows 7 Acer factory install clean out of the box [temp turn off Microsoft auto update], attach an Ethernet cable to give me internet, install Firefox 28.0 I get text only [are these pages css base?] pages for internal "Get Add-ons" page / "Welcome to Firefox" 1st run page / Mozilla "Plugin Check & Updates" page.

If I then flush all history and close - over install 27.0.1 and repeat all of the above I get then same results. Flush all history and close again, over install 27.0 and repeat all of the above - same text based results, flush all history and close again, over install 26.0 and repeat all of the above and we have a winner. Firefox 26.0 does not have a problem displaying any of the pages correctly.

Working my way back up version numbers again, flush all history, close Firefox, over install 27.0 and repeat all of the above and we are back to text based pages.

I have tried a forked version of Firefox - "Pale Moon - v24.4.2" on the same machine and this gives the exact same text based results. Would this then not indicate that it is something in the base coding or settings of Firefox that has been changed after Firefox v26.0?

Chrome and IE are displaying these Add-ons and Plugin Checks pages with no fault, why not Firefox 27 /28 ?

In the interests of curiosity I decided to try some of the beta builds, namely 28.b9 and 29.0b7 - unfortunately same text based results :-(

If I cannot get this to work correctly with these machines I may have to concede and let the Office users select Chrome which I really do not want to do.

Can I run any more logs files and upload them to assist in diagnoses of this problem for a hopeful fix?

Hi Jewelie, yes please. There were other issues last week that may have been caused by a separation of Add ons and marketplace, but would have been resolved with a simple cache clearing. So, this is obviously not the case.

Have you tested to see if there is a Firewall or antivirus blocking these dns names for these particular pages? It looks like you already cleared the cache and deleted cookies for these sites? Also temporary files associated with this site? This might sound nuts, but since it is just the about:addons page for get add ons, make sure this page is not blocked for content: https://services.addons.mozilla.org/e.../Darwin

Does it happen in another profile in another version that you downloaded. For example: Using Multiple Profiles

I'm having the same issues.. It's a "refurbished" laptop, exact same make/model/os as my previous. Everything still works fine on the old.. but not on this one. Cache is cleared/cookies cleared. Even though I have no add-ons.. went through options and turned them/safe mode... no change... reset to default.. no change The page loads through IE browser though. Checked that clock date/time is current.. addons.mozilla.org has exceptions rights

Hi Palak86, Thank you for your question, however please consider creating a new thread containing the specific details of your issue.

If I remember correctly this could be troubleshooted by clearing the cache, trying a new profile, trying safe mode, or a clean reinstall.

Doing so will allow the Mozilla volunteers to give you solutions that are more helpful to you. This may help them to solve your problem faster and more efficiently.

Please, feel free to post the link to your thread on this thread for volunteers interested in assisting you.

Thank you.