Mozilla Firefox 1 is a web browser developed by Mozilla Foundation , available for download in full install version for Windows platforms from legacy sources. This version of Firefox was officially released on 2004-11-09 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Firefox 1 is released with better tabbed browsing controls, You can now make links opened by other applications open into a new tab, reuse an existing tab, or open a new window. Firefox is available today in many languages. New experimental options for controlling where links in web pages open. To make these experimental options appear, set browser.tabs.showSingleWindowModePrefs to true in about:config.

Major improvements 

"Sort by name" in Bookmarks should sort siblings, not children. Information bar (blocked popup, missing plugin, etc) should be close-able. View Source should use Find Toolbar. Find toolbar loses content when new tab clicked. Disable sites reloading on resize. (Many sites reload on resize to work around bugs in Netscape 4. This caused problems in Firefox due to tabs, the Find bar, and information bars.)