How To: Fix Thunderbird failing to open HTTP / HTTPS links

If you recently upgraded Thunderbird to v52 onwards and all links in emails stopped working (i.e. clicking on a link doesn’t open them in your browser) then you can fix it like this:

  1. In Thunderbird, go to Tools | Clear Recent History and clear everything (this just removes your usage history, not any emails), then
  2. Close Thunderbird, go into your profile folder (i.e. where the emails are stored) and delete all the places.sqlite files.

Tap-tap. Job done.


How to: Get detailed browser memory usage from within Firefox or Chrome

Well, you could use the top command, or maybe some ps grepping like this:

But that’s not especially friendly to read, so how about simply going to the internal memory usage page at about:memory? (Note: Just put about:memory into the URL location and hit enter – I can’t link to it because it goes to about:blank instead!)

Firefox Memory Usage - Internal Display

Presumably this is a cross-platform method, so available on any modern version of Firefox or Chrome. The details in the above screengrab were taken on Firefox 6 on Linux with two windows containing 8 tabs in total open, and it’s chewing on 316MB of RAM? Ouch. When my wife plays Facebook games I’ve seen Firefox eating over 700MB for a single window with a single tab running FarmTown or Treasure Madness or such, but I guess that’s more down to the bloat of those flash games than the browser… Still, good technique.

Credit where it’s due: Tip found on – good find!