Sprint, Softbank confirm talks: Sprint Nextel confirmed that it is in discussions with Softbank, a Japanese telecommunications firm, over a “possible substantial investment” in the U.S. carrier.

In a statement, the company said the talks could “involve a change of control of Sprint,” but that discussions were not final.

The firm said that it will not comment further on the discussions unless the companies reach an agreement. A report from The Wall Street Journal indicated that it was not clear if Softbank was planning to buy all of Sprint, or considering a two-thirds stake in the company.

Huawei keeps wary U.S. partners: The Washington Post reported that Huawei competitors such as Cisco have been working to discredit the Chinese telecommunications company in the eyes of business partners — an effort that got a boost this week from a House panel report. U.S. communications infrastructure firms have been feeling the threat from the growth of low-priced Chinese competitors, the report said, and some analysts say the efforts to discredit Huawei stem from that unease.

The House report suggested the company is using its technology to assist China with cyberespionage, but many of the specific details remain classified. There have been no formal charges. The firm has vehemently denied those accusations.

Kindle: The Federal Communications Commission has given its approval to Amazon to sell its higher-end Kindle 4G tablets, Reuters reported Thursday the devices are direct competitors to Apple’s iPad line, escalating a battle between the technology industry’s largest companies in the tablet space.

Amazon had to put disclaimers on pages selling the devices, announced in September, to indicate that they were pending FCC approval.

Firefox: Mozilla advised those who use its Firefox browser not to use its latest version, citing a security vulnerability.

In a blog post Wednesday night, the company said it is working on a fix and will ship a new version of the browser on Thursday.

According to the company, the bug could allow malicious sites to figure out what Web sites users have visited. Mozilla has not had a report that anyone has taken advantage of the vulnerability.