In the past two days, users who are using the Firefox browser may have had the problem of being unable to connect to the Internet. At first, they thought it was a problem with the new version upgrade, and some people blamed the Win system. However, now the problem has been identified, it is the problem of Firefox itself The operator made a capitalization mistake in part of the code.
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The Firefox browser released version 96.0 a few days ago, which is said to greatly reduce the load of the main thread, which means that it can significantly reduce the occupation of system resources and run faster and more smoothly.
However, many people found that they could not connect to the Internet after upgrading, and then they checked a series of problems. First of all, they thought that the real culprit was the new version of Firefox 96.0. It turned out that Firefox 95 and previous versions also had problems.
There are also reasons to blame the patch upgrade of the Windows system, but the result is not. In addition, DNS, cloud service providers and other reasons have been found, and they have also been ruled out.
Finally, I found that the problem is related to Firefox’s HTTP3. After disabling it, you can surf the Internet. The real culprit has now been found, but where is the problem? The Mozilla Foundation has finally figured out the root cause – it has to do with code capitalization.
According to the official introduction, when parsing HTTP headers, Firefox will end with a function that usually only handles uppercase fields. If it is a lowercase letter, it will not be able to calculate the header length, causing the FireForx code to fall into an infinite loop.
After the problem is found, the process of fixing the error is also very simple, and the code will no longer be case-sensitive in the future.