Mozilla, developer of Firefox, threw in with the SOPA blackout today with a redesign of their webpage that displayed the following declaration:

For any of you caught unawares and can’t follow through with your plan to ditch Internet Explorer today for a new browser, you had a warning:

@firefox
FirefoxTomorrow Mozilla joins with other sites in a virtual strike to protest #PIPA and #SOPA http://t.co/isbPPYTo and http://t.co/09U6mz0m 8 hours ago via CoTweet · powered by @socialditto

Mozilla Chairwoman Mitchell Baker elaborates on the decision to blackout the site on her blog:

SOPA makes all of us potential criminals if we don’t become the enforcement arm of a new government regulatory and policing structure. SOPA does not target websites serving up unauthorized content. SOPA does not target people accessing those websites. SOPA targets all the rest of us. These costs are significant, wide-ranging and long lasting. To understand more clearly what SOPA does and the range of consequences, it’s helpful to use an analogy from the physical world where we all have many years of experience.