The only reason we have Firefox today is because Microsoft used their signature anti-competitive business practice to butcher Netscape. Google helped Firefox to generate revenue so as to create a competitor to Microsoft's fossilized Internet Explorer and bring the Web to the highway.
Firefox used Google as its default search engine. The open source browser signed a deal with Microsoft recently to also use Bing as a search option.
Just today the open source browser announced another deal to feed the hand that bites it. The Mozilla foundation has announced a version of Firefox with Bing as the default search engine.
Microsoft is an abusive monopoly which kept all other players out of the PC business. When Linux emerged as a contender they started attacking all Linux players over unknown patent issues which Linus Torvalds called bogus.
Later when Android emerged as a leader in the mobile space where Microsoft is non-existent the company started trolling Android players and signed deals to increase the cost of Android (which failed to have any impact).
If we come back to the web browser segment, while Google offers Bing as an option to be selected in the very first step when you install Google Chrome, Microsoft has made it almost impossible to set Google as the default search engine.
Looking at this, the decision Firefox has made is sad. While I do understand that Google-Firefox is due for a renewal, and Firefox may be desperate to get someone to feed it, but going with Microsoft's Bing is like pouring acid in your roots.
Firefox is fast losing market share to Google Chrome due to its sluggish performance. There are users who are still using Firefox for 'philosophical' reasons. The deal and release of the 'exclusive' Bing version breaks that trust in Firefox. If we look back Microsoft has a kind of Midas Touch, every company or project it touches simply dies, whether it be Novell, Nortel, Nokia or Yahoo! Is Firefox committing suicide by going to bed with Microsoft? What do you say?