Concurrent versions of Internet Explorer / Safari

Every time you install a newer version of Internet Explorer, Windows has a tendency to overwrite previous versions. And generally, that’s a good thing. But if you’re a developer and you want to see how your website looks to someone running an ancient browser, you might want to install an old copy of Internet Explorer alongside your IE7.

It is not difficult to follow the instructions and get any version of IE running in standalone along side other versions. Most of you probably know of evolt’s archive of Internet Explorer which has them readily packaged in ZIP files. Now suppose you want to download them all. An installer that would conveniently automate the whole process would be great.  Yousif Al Saif created a nice installer. It will install Internet Explorer 3, 4.01, 5, 5.5, and 6. The installer will not work with Windows Vista

Safari normally use the Web Kit framework found inside Mac OS X to render web pages and execute javascript. This means that if you preserve an old version of Safari to run it on a newer version of Mac OS, it will use the newer Web Kit found in the system and you will get the same results as with the newer version. Thus, you would normally need a separate installation of Mac OS X for each version of Safari you want to test a website into.

Multi-Safari use the original Web Kit framework that came with them, bundled inside the application. They will mimic original Safari rendering and javascript behaviours. HTTP requests and cookies however are still handled by the system and may not work exactly the same.

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