Networking Tips: Optimize Your Browser's Internet Connection Impacts on Performance and Privacy Michael Hall
If you just want a faster browser, pick the "Optimized" setting in FasterFox and move on. If you visit a lot of smaller sites with not a lot of bandwidth or server horsepower, it might be more polite to set it to "Courteous," which only applies optimizations that have nothing to do with the server.
If you choose to customize Fasterfox, two settings have to be addressed because they can have a real impact on performance and privacy.
First is the "prefetching" setting. As we mentioned, prefetching allows a browser to visit each link on the page you're reading and download it in the background so the page is ready for you right away. A common trick on Web pages that presented sequential photo galleries or the like involved a variation on this, with Webmasters putting the next page's image in a single-pixel <img> tag so it would be loaded into the browser's cache for presentation as a full-sized image when a visitor followed the link. Lately, prefetching refers to the use of a <link> tag with a "rel='prefetch'" argument. That way, a site designer can specify which pages are prefetched.
Fasterfox takes this to the next level by not only looking for those tags, but prefetching likely candidates all on its own whether they have the tag or not.
If you browse at home or generally stick to sites that are both harmless in and of themselves and can be trusted to link to other harmless sites, prefetching is fine. If you browse a lot at work, or visit sites that are a little more sketchy or willing to link to other sites with questionable content, you should proceed with caution: Prefetching will count, for the purposes of any monitoring software your company might be using, as a download or page access. Think about sites like Fark or elsewhere, and things they link to that you wouldn't ever visit at work, then think about yourself being on record as following every single one of those links in a visit to the front page.
Fasterfox allows you to disable prefetching (wise) or at least set a list of pages it is not to prefetch from (at least cautious, but probably not practical, especially if you're supposed to be working and not spending all your time devising prefetch blacklists so you can safely visit Fark on the clock).
A second set of optimizations, pipelining, deals with Firefox's capability to send multiple requests for Web data over an HTTP connection without getting an answer back first. Newer Web servers will have no problem with this as it's a full part of the HTTP 1.1 specification. Older Web servers and proxies might not deal with it as well, in which case you'll get some strange behavior. If a page you used to visit just fine before you installed Fasterfox starts to misbehave, take a look at your pipelining settings. If you turn pipelining off and you're still having problems, consider downloading our next extension.
ServStats
Ever wonder if the whole Internet was broken or if it was just you? Most people who dabble with networking enough to at least know that there are such things as "packets" and "routes" will reply to an apparent site outage with a quick ping or traceroute. Some home routers are hard on traceroute requests, like my last Linksys router, which had a built-in traceroute tool hidden down in some submenu to offset the fact that the router ate traceroute packets alive. Plus, even if you can see that you have a fine connection, you don't always know that the issue is network-related.
In these cases, ServStats might come in handy. It provides a simple button you can click when a site's giving you problems to find out what the average performance of that site is, as cataloged by other ServStats users when they've visited the same site. The window tells you how successful others have been at connecting to the site, and what the average latency of the connections were.
This of course can be handy for figuring out what might or might not be wrong with your own connection, or for looking in on sites you run to see if your visitors are having a hard time connecting, requiring a consult with your provider (be it hosting or Internet).
