I have a lot of extensions in Google Chrome, but I keep most of them disabled. Does having them there affect in any way the speed of the browser?
You can check yourself which extension is taking up memory and how much and in result slowing down the browser performance. You can check the About memory: Measuring memory usage in a multi-process browser page in Google Chrome by going to this url:
Having a lot of extensions installed will have an impact on Chrome regardless of whether they are enabled or not, however the impact will be much worse if you have many enabled extensions.
If you have a lot of extensions and many are enabled, not surprisingly, you will notice that the whole browser gets bogged down. This is exacerbated if many of the extensions are global, always running extensions (i.e., that affect all sites, or the browser itself).
Even if most of the extensions are disabled however, there will still be an increase in start-time because Chrome reads (if not loads) them on startup regardless of their state. This delay isn’t too much unless you really have a lot of extensions, so for most people, having a bunch of extensions won’t cause a problem in this respect.
Where you will notice it is in the extensions page itself (