My guess would be a Flash issue. Could you try temporarily setting Flash to click-to-play so that Imgur (and other sites) can't use it until you approve it? Here's how:

Open the Add-ons page using either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Plugins. Look for "Shockwave Flash" and change "Always Activate" to "Ask to Activate".

When you visit a site that wants to use the Flash, you should see a notification icon in the address bar (looks like a small piece of Lego) and usually one of the following: a link in a black rectangle in the page or an infobar sliding down between the toolbar area and the page. You only need to allow Flash when it seems necessary to access the content you want.

Any difference?

To complete my thought: slow script errors can indicate a problem with the Flash plugin's protected mode feature. It has security benefits, but is not compatible with all systems for some reason.

You can disable the feature by creating or editing a settings file. The following pages/posts provide different approaches:

• Adobe support article under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

• Manual steps: https://support.mozilla.org/questions/968190?page=5#answer-509209

• Batch file to automate the manual steps: https://support.mozilla.org/questions/982093#answer-518078

Flash needs to completely unload from memory (exiting and starting Firefox up again might help) before this takes effect.

uruz7 said

I've used firefox for 2 months, things go smooth for a while , now i'm getting this terrible freezing issue, where , when i open an imgur link the whole browser freezes and stops responding, sometimes it would display a SCRIPT MESSAGE, stop script, debug or continue, and even then would still be froze and could not do anything, i don't understand what is the cause i don't have many add-ons only adblock and roomy taskbar. Help :(

You hero of a man, many thanks to you, i will sing praises and erect a statue in your honor, yes it's a huge difference now :) no more freeze.....

again many thanks :D