I have a very slow modem TFM-560U Trendnet it was working ok before i have w7 , ie9 or firefox4 really bad i did a restore from w7 sp1, no change

A slow running Firefox can be fixed by:

Uninstall unwanted add-ons:


First thing that you should do to fix Mozilla Firefox slowis to uninstall unwanted add-ons installed. Some websites forcefully installtoolbars or add-ons that cause your browser to crash often.


Scan System for viruses:


If you don't have antivirus installed on your system thenmalware can intercept smooth communication of browser and operating system.Also make sure that antivirus program that you are using is updated. Rememberto clean your system with some powerful antivirus program.


Fix Windows Registry:


Browser related setting is stored in the registry databaseof operating system. You may receive various problems when registry entriesrelated to browser are corrupted, missing or damaged.


There are two methods to fix this problem. One of them isto manually modify your registry and another is to use third party registrycleaner and PC optimizer software. Manual modification is not recommended as itis complicated. You may opt for second method that is to use third partyregistry cleaner and PC optimizer.


Update Drivers:


If Mozilla is slow it could be your outdated driverscausing problem. To solve this problem, update your device drivers. Here aresteps to do so:


1. Right click on My Computer.
2. Select properties in the dropdown.
3. Click on Hardware Tab.
4. Now click on Device Manager.
5. Select the device, note down its name.
6. Open web browser.
7. Search for drivers.
8. Restart your computer.


2. To automatically fix Mozilla slowing problem,use this globally known Intel Software Partner, RegInOut. You can stop browsercrashes quickly with a single click using this tool.