Firefox Throttle & IE Throttle are FREE plug-ins for the two most popular browsers and of no interest to most people, but might be interesting to webdevelopers to monitor real page weights, page load times at different connections speeds, etc.

IE Throttle is a small plug-in for your Microsoft Internet Explorer, that allows you to cap download/upload rates.

Features

• Limit download and upload rates for all Tabs and Windows open by single Internet Explorer process
• Bursting mode (allow short rate "bursting" after inactivity)
• Preset and custom limits
• Exclude lists for IP addresses and domains that should not be throttled
• Automatically excluded LAN IPs

Firefox Throttle is a small plug-in for your favorite Web Browser, that allows you to cap download/upload rates and monitor current bandwidth utilization.

Features

• New! Throttle localhost connections
• Limit download and upload rates for all open Firefox windows/tabs and downloads
• Bursting mode (allow short rate "bursting" after inactivity)
• Preset and custom limits
• Updated! Configurable lists for IP addresses and domains that should not be throttled
• Automatically excluded LAN IPs
• Traffic stats (for current session and historic since last reset)
• Status panel with current bandwidth utilization indicators (or traffic counters)
• Quick throttling on/off toggle on status panel
• English and Russian User Interface

Download
Download IE Throttle
Download Firefox Throttle