Why does Boot-Repair ask me to connect internet ?

Boot-Repair may need internet for various actions, for example:
1) Purging, downloading then reinstalling GRUB
2) Purging, downloading then reinstalling the Linux kernel
3) Uploading the BootInfo onto a pastebin
4) Participating to statistics of use (this action is skipped if no internet detected)
5) converting a system to UEFI mode
6) converting a system to Legacy mode

If internet is not connected at all (or if it is not correctly detected by Boot-Repair), here is what should happen:
1) GRUB purge will be cancelled
2) Kernel purge will be cancelled
3) Pastebin upload will be skipped, and you will be presented the BootInfo summary in a text viewer
4) Statistics sending will be skipped

So, in definitive, Boot-Repair can always be used without internet, except when GRUB or Linux purge is needed.

In case your internet is connected (eg you can browse the web via Firefox) but Boot-Repair doesn't detect it, please create a new bug report here: https://bugs.launchpad.net/boot-repair