diff --git a/_Sidebar.md b/_Sidebar.md
index be4c30f..c0bd8da 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -2,6 +2,7 @@
 - [Permissions](./Permissions)
     - [Can you trust uBlock Origin?](./Can-you-trust-uBlock-Origin%3F)
 - [Privacy policy](./Privacy-policy)
+    - [Why don't you accept donations?](./Why-don't-you-accept-donations%3F)
 - [The popup user interface](./Quick-guide:-popup-user-interface)
     - [The per-site switches](./Per-site-switches)
 - [Dashboard](./Dashboard)
@@ -44,6 +45,17 @@
     - [Overview of uBlock's network filtering engine: details](./Overview-of-uBlock's-network-filtering-engine:-details)
     - [Does uBlock Origin block ads or just hide them?](./Does-uBlock-Origin-block-ads-or-just-hide-them%3F)
     - [Doesn't uBlock Origin add overhead to page load?](./Doesn't-uBlock-Origin-add-overhead-to-page-load%3F)
+    - [About "Why uBlock Origin works so much better than Pi‑hole does?"](./About-%22Why-uBlock-Origin-works-so-much-better-than-Pi%E2%80%91hole-does%3F%22)
+- About uBlock's resource usage:
+    - [Memory footprint: what happens inside uBlock after installation](./Memory-footprint:-what-happens-inside-uBlock-after-installation)
+    - [uBlock vs. ABP: efficiency compared](./uBlock-vs.-ABP:-efficiency-compared)
+    - [Counterpoint: Who cares about efficiency, I have 8 GB RAM and|or a quad core CPU](./Who-cares-about-efficiency,-I-have-8-GB-RAM-and%7Cor-a-quad-core-CPU)
+    - [Myth: uBlock consumes over 80MB](./Myth:-uBlock-consumes-over-80MB)
+    - [Myth: uBlock is just slightly less resource intensive than Adblock Plus](./Myth:-uBlock-is-just-slightly-less-resource-intensive-than-Adblock-Plus)
+    - [Myth: uBlock consumes several or several dozen GB of RAM](./Myth:-uBlock-consumes-several-or-several-dozen-GB-of-RAM)
+    - [Various videos showing side by side comparison of the load speed of complex sites](./Various-videos-showing-side-by-side-comparison-of-the-load-speed-of-complex-sites)
+    - [Own memory usage: benchmarks over time](./Own-memory-usage:-benchmarks-over-time)
+    - [Contributed memory usage: benchmarks over time](./Contributed-memory-usage:-benchmarks-over-time)
 - [Tools, tests](./Tools)
 - [Deploying uBlock Origin](./Deploying-uBlock-Origin)
 - Troubleshooting:
@@ -51,3 +63,8 @@
     - [Software known to have uninstalled uBlock Origin](./Software-known-to-have-uninstalled-uBlock-Origin)
     - [The removed element reappears when you reload the page](./Element-picker#element-picker-does-not-work-removed-element-reappears-when-you-reload-the-page)
     - [Read carefully if using uBO/webext on legacy Firefox](./Firefox-WebExtensions)
+- Good external guides:
+    - [How to use uBlock Origin advanced user mode tutorial ↗︎](https://www.youtube.com/watch?v=2lisQQmWQkY)
+    - [Firefox: uBlock Origin – Firefox-Kompendium Teil2 ↗︎](https://www.kuketz-blog.de/firefox-ublock-origin-firefox-kompendium-teil2/)
+    - [Beginners Cheat Sheet - "Syntax Meanings That Are Actually Human Readable" ↗︎](https://github.com/DandelionSprout/adfilt/blob/master/Wiki/SyntaxMeaningsThatAreActuallyHumanReadable.md)
+- [Scientific papers](./Scientific-papers)
\ No newline at end of file