The correct Safari version for Lion is 5.1
So the problems with Safari started after you upgraded to Lion.
You may have a third party Safari add on installed that was compatible with the prior version of Safari but not 5.1.
Troubleshooting help here > Safari: Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues
The latest Safari in SnowLeopard is Safari 5.1.
In Lion there is also Safari as part of the system: it is also Safari 5.1.
Why would you want to uninstall Safari from Lion?
It does not change anything to install the Safari 5.1 of SL.
If you are having problems with Safari in Lion, there are several threads that are discussing this.
Basically they're the same but the advantage of Extensions is that you can turn them on or off which makes troubleshooting easier then dealing with plugins that are installed in your user and root libraries.
Better to troubleshoot your current copy of Safari rather then to delete it then reinstall.
Third party plugins are most likely the cause of the problems you are having with Safari. Try the troubleshooting link I posted previously.
Hi! Well, there are many bugs or things that aren't working as expected, such as sometimes when I open a new tab or hovering my mouse at the top bar; when I move the cursor away, fullscreen should return and the menu hides back. Usually it does but sometimes it doesn't and it sort of hangs in mid animation. I am able to do things normally but I can fix it temporarily by going to Mission Control and back again.
2nd error is that sometimes a page URL will show loaded but the content is 100% missing. I have to keep reloading and reloading the page and even then, it doesn't always fix it temporarily.
3rd error is the moment I click on a link, just as it's about to start to load, the page crashes. I have to keep reloading and reloading the page and even then, it doesn't always fix it temporarily.
I just read on that article you guys gave me and it says that
This article does not apply to Internet Plug-Ins such as QuickTime, Java and Adobe Flash. It also does not apply to Safari Extensions. As far as I know, I don't use addons; I only have Safari Extensions.
You mentioned that the problems started after the upgrade. It's possible you have a third party add on installed that was compatible with prior versions of Safari but not 5.1.
Manually uninstall third-party add-ons
If the software doesn't have an uninstall feature, quit Safari and try manually removing the third-party add-on files. These files are usually installed in one or more of the following locations:
- /Library/Internet Plug-Ins/
- /Library/Input Methods/
- ~/Library/Internet Plug-Ins/
- ~/Library/Input Methods/
The first four locations listed are in the root-level Library on your hard disk, not the user-level Library in your Home folder.The tilde (~) represents your Home folder.
- To find the Home folder in OS X Lion, open the Finder, hold the Option key, and choose Go > Library.
You have been already suggested what to do: do not delete Safari. Safari, like QuickTime and other Apple apps are part of the system components, even if not a part of the system proper. You may get into other troubles if you delete these apps, and the final result may be you must reinstall the system. This is not a tragedy, on the contrary, may prove the best solution if you cannot solve things. Another principle is to not install things you do not need, like Safari add’s or xtns’s.