Questions[extension](ubuntu)

Ubuntu 18.04.1, GNOME 3.28.2, Tweaks -> Extension: Dash to panel

After some updates 05 Jan 2019 - 08 Jan 2019 I began to see sometimes:

Unstable:

(But this is NOT permanent! For example i made screenshot from normal behavior. + Same troubles on login screen which reduces the extensions effect!)

Stable:

Simple temporary fix - is select language with mouse cursor or twice with keyboard hotkeys.

A recent update of Thunderbird in Ubuntu (version 60.2.1) broke the Lightning calendar installed as add-on. See here. Mozilla provides Lightning as bundled in the last versions, but Ubuntu (and Debian?) package do not, so now there is a mismatch between the Thunderbird version in the repositories and the add-on provided by Mozilla (5.4, only useful for Thunderbird 52).

One suggested option is to search and install beta releases provided by Mozilla, but it looks as a workaround (future automatic updates are compromised). Another is to delete the non-compatible Ligthning add-on and install a separate package (xul-ext-lightning) via apt, but it is not localised (only available in English since at least 2010).

So, which is the proper "future-proof" way to install Lightning in Mozilla Thunderbird from now on (as intended by Ubuntu maintainers)?

1. Remove the internal add-on (.xpi) and install (xul-ext-lightning) [this package will be updated accordingly, together with Thunderbird and, eventually, localised]
2. Keep the Mozilla add-on until the mismatch with Thunderbird apt package is fixed
3. Remove the add-on and wait until a future Thunderbird apt package provides it integrated (as Mozilla bundles it for other platforms)

After update, my Thunderbird stopped getting minimized with the "MinimizeToTray revived" add-on.
Is there any way to minimize my Thunderbird? Any other add-on that works with the new version?

I was wondering what's the need to put executable commands inside a .sh file to make a single script, since I can do the same by putting the commands inside a .txt file and making it executable using chmod.

I'm assuming this can be done with any of the file extensions. So, I am quite confused about the need for .sh extension. Any help would be much appreciated.

On my windows PC in my office, my chrome extensions are all along the toolbar as they always have been, however on my ubuntu machine at home they are now in a dropdown next to the spanner icon. It's a bit annoying as I can't see when I have new mail, tweets etc.

Chrome version 7.0.517.44

If anyone knows how to resolve this it would be much appreciated.

Thanks,

Drew